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combustion.","correct":false,"explanation":"Combustion involves chemical reactions and cannot supply a star’s enormous, long-lasting energy output. The correct process is nuclear fusion, which joins atomic nuclei and releases energy from mass conversion."},{"text":"Gravitational contraction.","correct":false,"explanation":"Gravitational contraction can heat a forming star, but it does not power a stable star for most of its lifetime. The sustained energy source is nuclear fusion in the core."},{"text":"Radioactive decay.","correct":false,"explanation":"Radioactive decay releases energy from unstable nuclei, but it is not the main process powering ordinary stars. Nuclear fusion joins light nuclei and provides the star’s continuing energy supply."}]},{"id":"1c4d9911-6a06-4707-9bc1-5f435c4a9294","cardType":"cloze","points":null,"front":"In nuclear fusion, [ ] join together, releasing [ ].","back":"In nuclear fusion, light atomic nuclei join together, releasing energy.","mcqOptions":[{"text":"In nuclear fusion, light atomic nuclei join together, releasing energy.","correct":true,"explanation":"Fusion combines light atomic nuclei, such as hydrogen nuclei, into heavier nuclei. The small mass difference is converted into energy, which powers the star and is released as radiation."},{"text":"In nuclear fusion, heavy atomic nuclei join together, releasing energy.","correct":false,"explanation":"The process begins with light nuclei, not heavy ones; confusing fusion with reactions involving already heavy nuclei changes the definition. The correct completed sentence uses light atomic nuclei and energy."},{"text":"In nuclear fusion, light atomic nuclei split apart, releasing energy.","correct":false,"explanation":"Splitting nuclei describes nuclear fission, not fusion. Fusion joins light atomic nuclei together, and the resulting mass difference releases energy, so both the action and the completed sentence differ here."},{"text":"In nuclear fusion, electrons join together, releasing light.","correct":false,"explanation":"Electrons are not the nuclei involved in fusion, and the released quantity is energy rather than light alone. The correct description is that light atomic nuclei join together, releasing energy."}]},{"id":"2fc11152-2c59-4fd3-b077-80092bec56bf","cardType":"basic","points":1,"front":"In a stable main sequence star, what balances inward gravity?","back":"Outward pressure from fusion.","mcqOptions":[{"text":"Outward pressure from fusion.","correct":true,"explanation":"Fusion heats the stellar gas, producing outward pressure. In a stable main sequence star, this pressure balances the inward pull of gravity, creating hydrostatic equilibrium."},{"text":"Inward pressure from fusion.","correct":false,"explanation":"Fusion produces pressure directed outward, opposing gravity. Calling it inward would make both effects act in the same direction; the correct balance is outward pressure from fusion against inward gravity."},{"text":"Outward magnetic force from fusion.","correct":false,"explanation":"Magnetic forces can affect stellar plasma, but they are not the standard opposing force in this equilibrium. The expected answer is outward pressure produced by fusion heating the star."},{"text":"Outward pressure from gravity.","correct":false,"explanation":"Gravity pulls matter inward rather than producing an outward effect. Fusion supplies the outward pressure, so stable stars balance inward gravity with outward pressure from fusion."}]},{"id":"bfafec79-2f6e-444d-8840-8dcfa5e5d4ba","cardType":"basic","points":1,"front":"Which star colour indicates the highest surface temperature?","back":"Blue or blue-white.","mcqOptions":[{"text":"Blue or blue-white.","correct":true,"explanation":"Blue and blue-white stars have the highest surface temperatures. Stellar colour is related to thermal radiation, with hotter stars emitting proportionally more short-wavelength blue light."},{"text":"Red or orange.","correct":false,"explanation":"Red and orange stars have cooler surfaces than blue stars. The highest surface temperatures are indicated by blue or blue-white colour because hotter objects emit shorter-wavelength radiation."},{"text":"Yellow or yellow-white.","correct":false,"explanation":"Yellow and yellow-white stars have intermediate surface temperatures, like the Sun. The hottest stellar surfaces appear blue or blue-white, not yellow."},{"text":"Green or green-white.","correct":false,"explanation":"Green is not the standard colour category used to identify the hottest stars in stellar classification. Blue or blue-white indicates the highest surface temperature."}]},{"id":"c56ec485-122c-440b-96ca-9ce629085b84","cardType":"basic","points":1,"front":"What does a red star colour show about surface temperature?","back":"A cooler surface temperature.","mcqOptions":[{"text":"A cooler surface temperature.","correct":true,"explanation":"Red stars have cooler surfaces than yellow, white, or blue stars. Their lower temperature means their emitted radiation is shifted towards longer wavelengths, which appear red."},{"text":"A hotter surface temperature.","correct":false,"explanation":"Red light indicates a relatively cool stellar surface, not a hotter one. Blue stars are hotter because their radiation is concentrated more strongly at shorter wavelengths."},{"text":"A higher surface temperature.","correct":false,"explanation":"A red colour is associated with a lower surface temperature than blue or yellow stars. The correct conclusion is that the star has a cooler surface temperature."},{"text":"A more variable surface temperature.","correct":false,"explanation":"Colour mainly indicates a star’s surface temperature, rather than how much that temperature changes. Red shows a cooler surface temperature compared with hotter blue or yellow stars."}]},{"id":"cea32076-a162-4adb-b1a3-7cee5592edf2","cardType":"basic","points":2,"front":"Order blue-white, yellow and red stars from hottest to coolest.","back":"Blue-white, then yellow, then red.","mcqOptions":[{"text":"Blue-white, then yellow, then red.","correct":true,"explanation":"Blue-white stars are hottest, yellow stars have intermediate temperatures, and red stars are coolest. The sequence follows the relationship between stellar colour and surface temperature."},{"text":"Red, then yellow, then blue-white.","correct":false,"explanation":"This reverses the temperature trend, treating red as hottest. In reality, blue-white stars have the highest surface temperatures, followed by yellow, with red stars coolest."},{"text":"Yellow, then blue-white, then red.","correct":false,"explanation":"Yellow stars are cooler than blue-white stars, so placing yellow first is incorrect. The correct order from hottest to coolest is blue-white, yellow, then red."},{"text":"Blue-white, then red, then yellow.","correct":false,"explanation":"Although blue-white correctly comes first, red stars are cooler than yellow stars and must come last. The correct hottest-to-coolest order is blue-white, yellow, then red."}]},{"id":"c60dffe3-14e4-4258-bd21-f9af1ad0e0ec","cardType":"cloze","points":null,"front":"All stars begin in a [ ]; gravity pulls material together into a [ ].","back":"All stars begin in a nebula; gravity pulls material together into a protostar.","mcqOptions":[{"text":"All stars begin in a nebula; gravity pulls material together into a protostar.","correct":true,"explanation":"A nebula is a cloud of gas and dust where stars form. Gravity draws this material together, creating a dense, heating protostar before nuclear fusion begins."},{"text":"All stars begin in a protostar; gravity pulls material together into a nebula.","correct":false,"explanation":"The stages are reversed here. A nebula is the original gas-and-dust cloud, while gravitational collapse within it produces a protostar."},{"text":"All stars begin in a molecular cloud; gravity pulls material together into a main sequence star.","correct":false,"explanation":"A molecular cloud can describe star-forming material, but the expected sequence identifies the starting cloud as a nebula and the immediate collapsed object as a protostar."},{"text":"All stars begin in a supernova; gravity pulls material together into a red giant.","correct":false,"explanation":"A supernova is a later explosive event, and a red giant is a later evolutionary stage for suitable stars. Formation starts in a nebula and produces a protostar."}]},{"id":"64b830ed-f0c7-4f0b-bcc0-bfec4ba423d1","cardType":"cloze","points":null,"front":"For a Sun-like star, the main sequence is followed by a [ ] and ends as a [ ].","back":"For a Sun-like star, the main sequence is followed by a red giant and ends as a white dwarf.","mcqOptions":[{"text":"For a Sun-like star, the main sequence is followed by a red giant and ends as a white dwarf.","correct":true,"explanation":"After core hydrogen is used up, a Sun-like star expands into a red giant. It then sheds its outer layers, leaving the hot dense core known as a white dwarf."},{"text":"For a Sun-like star, the main sequence is followed by a red supergiant and ends as a neutron star.","correct":false,"explanation":"Red supergiants and neutron stars are associated with much more massive stars. A Sun-like star becomes a red giant and ultimately leaves a white dwarf."},{"text":"For a Sun-like star, the main sequence is followed by a white dwarf and ends as a red giant.","correct":false,"explanation":"This reverses the evolutionary order. Expansion into a red giant occurs before the outer layers are lost and the remaining core becomes a white dwarf."},{"text":"For a Sun-like star, the main sequence is followed by a red giant and ends as a black hole.","correct":false,"explanation":"A Sun-like star does not have enough mass to collapse into a black hole. After its red giant stage, it ends as a white dwarf."}]},{"id":"4ce63261-449a-4e49-8f8a-161e35f853f1","cardType":"basic","points":2,"front":"Why does a Sun-like star look redder in the red giant stage?","back":"Outer layers expand and the surface cools.","mcqOptions":[{"text":"Outer layers expand and the surface cools.","correct":true,"explanation":"Expansion spreads the star’s energy over a much larger surface area, reducing its surface temperature. A cooler surface emits more strongly at red wavelengths, so the star appears redder."},{"text":"Outer layers contract and the surface heats.","correct":false,"explanation":"This reverses both changes occurring during the red giant stage. The outer layers expand and the surface cools, shifting the star’s emitted light towards redder wavelengths."},{"text":"Outer layers expand and the surface heats.","correct":false,"explanation":"Although the outer layers do expand, the surface does not heat up. Expansion lowers the surface temperature, causing the star to emit a greater proportion of red light."},{"text":"Outer layers contract and the surface cools.","correct":false,"explanation":"The outer layers do not contract when the star becomes a red giant. They expand greatly, and the resulting cooler surface makes the star look redder."}]},{"id":"f307f885-8b8d-49e5-8f6e-4769bb9fe31d","cardType":"basic","points":1,"front":"What can form when a Sun-like star's outer layers drift away?","back":"A planetary nebula.","mcqOptions":[{"text":"A planetary nebula.","correct":true,"explanation":"The expelled outer layers spread into space and glow after being ionised by the hot remaining core, forming a planetary nebula around the star."},{"text":"A protostar.","correct":false,"explanation":"A protostar forms when a cloud of gas and dust collapses before a star reaches the main sequence. Drifting outer layers instead form a planetary nebula."},{"text":"A supernova remnant.","correct":false,"explanation":"A supernova remnant results from the explosive death of a massive star. A Sun-like star sheds its outer layers more gently, producing a planetary nebula."},{"text":"A molecular cloud.","correct":false,"explanation":"A molecular cloud is a large region where stars may begin forming, not the product of a dying Sun-like star. Its expelled layers form a planetary nebula."}]},{"id":"65963470-c745-4eed-981a-1ee4d8db38fd","cardType":"basic","points":1,"front":"How does a massive main sequence star use fuel compared with a Sun-like star?","back":"It uses fuel much faster.","mcqOptions":[{"text":"It uses fuel much faster.","correct":true,"explanation":"A massive star has a hotter, denser core, so nuclear fusion proceeds at a much greater rate. It therefore consumes its available fuel much faster."},{"text":"It uses fuel much slower.","correct":false,"explanation":"Greater mass does not make a star conserve its fuel. Its hotter core drives a much higher fusion rate, so it uses fuel much faster."},{"text":"It uses fuel at the same rate.","correct":false,"explanation":"Stars of different masses do not consume fuel at equal rates. A massive star’s higher core temperature makes fusion faster, so its fuel is used much faster."},{"text":"It uses fuel slightly slower.","correct":false,"explanation":"Massive stars contain more fuel, but their fusion rate increases even more dramatically. Consequently, they use fuel much faster and have shorter main sequence lifetimes."}]},{"id":"5e4355d9-4723-4202-b633-9d52b5696e46","cardType":"cloze","points":null,"front":"A more massive star becomes a [ ] before exploding as a [ ].","back":"A more massive star becomes a red supergiant before exploding as a supernova.","mcqOptions":[{"text":"A more massive star becomes a red supergiant before exploding as a supernova.","correct":true,"explanation":"After leaving the main sequence, a massive star expands into a red supergiant. Its core eventually collapses, triggering the enormous explosion called a supernova."},{"text":"A more massive star becomes a red giant before exploding as a supernova.","correct":false,"explanation":"An ordinary red giant is associated with the later evolution of a Sun-like star. A more massive star becomes a red supergiant before exploding as a supernova."},{"text":"A more massive star becomes a red supergiant before exploding as a planetary nebula.","correct":false,"explanation":"A planetary nebula is produced when a Sun-like star gently sheds its outer layers, not when a massive star explodes. A massive star’s explosion is a supernova."},{"text":"A more massive star becomes a white dwarf before exploding as a planetary nebula.","correct":false,"explanation":"A white dwarf and planetary nebula belong to the evolution of a Sun-like star. A massive star instead becomes a red supergiant and then explodes as a supernova."}]},{"id":"fd86c88f-d4dd-4b37-80be-c57252671e49","cardType":"basic","points":2,"front":"What collapsed remnants can a massive star leave after a supernova?","back":"Neutron star or black hole.","mcqOptions":[{"text":"Neutron star or black hole.","correct":true,"explanation":"After a supernova, the collapsed core can become a neutron star. If the remaining core is sufficiently massive, it continues collapsing to form a black hole."},{"text":"White dwarf or planetary nebula.","correct":false,"explanation":"White dwarfs are remnants of Sun-like stars, while planetary nebulae are expelled gas rather than collapsed cores. Massive-star cores leave neutron stars or black holes."},{"text":"Red giant or white dwarf.","correct":false,"explanation":"Red giants and white dwarfs belong to the evolutionary pathway of Sun-like stars. A massive star’s core can instead collapse into a neutron star or black hole."},{"text":"Protostar or red supergiant.","correct":false,"explanation":"A protostar is an early stage of star formation, and a red supergiant exists before the supernova. The collapsed remnant is a neutron star or black hole."}]},{"id":"21277173-01eb-4c1a-a33d-9320beb4b949","cardType":"basic","points":1,"front":"What cannot escape from a black hole?","back":"Light.","mcqOptions":[{"text":"Light.","correct":true,"explanation":"Inside a black hole’s event horizon, gravity is so strong that the required escape speed exceeds the speed of light. Consequently, even light cannot escape."},{"text":"Gravity.","correct":false,"explanation":"A black hole’s gravitational influence extends beyond its event horizon and can affect nearby matter, so gravity is detectable outside it. Light cannot escape from within the horizon."},{"text":"Surrounding gas.","correct":false,"explanation":"Gas surrounding a black hole can remain in orbit or be driven away before crossing the event horizon. Once inside the horizon, even light cannot escape."},{"text":"Orbiting stars.","correct":false,"explanation":"Stars can orbit a black hole safely outside its event horizon and may move away if their trajectory permits. Light cannot escape after crossing the event horizon."}]},{"id":"475e9ec3-0db0-4b25-9c83-cbacb309c586","cardType":"basic","points":2,"front":"Why can apparent brightness mislead comparisons of stars?","back":"It depends on distance as well as true brightness.","mcqOptions":[{"text":"It depends on distance as well as true brightness.","correct":true,"explanation":"The light received from a star decreases as its distance increases, even if its intrinsic luminosity is unchanged. Apparent brightness therefore reflects both distance and true brightness."},{"text":"It depends on true brightness but not distance.","correct":false,"explanation":"This overlooks the inverse-square effect of distance. Two equally luminous stars can have different apparent brightnesses because the more distant star’s light is spread over a larger area."},{"text":"It depends on distance but not true brightness.","correct":false,"explanation":"Distance alone is insufficient because intrinsically brighter stars emit more energy. Apparent brightness depends on both a star’s distance and its true brightness."},{"text":"It is the same at every viewing distance.","correct":false,"explanation":"Apparent brightness changes with viewing distance because the emitted light spreads over an increasing area. It also depends on the star’s true brightness, so it is not constant."}]},{"id":"fdcb1596-52c0-4ea1-9f2f-cfa7ba063aed","cardType":"cloze","points":null,"front":"Absolute magnitude compares stars at a [ ]; lower values mean [ ] stars.","back":"Absolute magnitude compares stars at a standard distance; lower values mean brighter stars.","mcqOptions":[{"text":"Absolute magnitude compares stars at a standard distance; lower values mean brighter stars.","correct":true,"explanation":"Absolute magnitude removes the effect of differing distances by assigning each star a standard distance. The magnitude scale runs backwards, so lower values represent brighter stars."},{"text":"Absolute magnitude compares stars at a actual distance; lower values mean brighter stars.","correct":false,"explanation":"Using each star’s actual distance describes apparent magnitude rather than absolute magnitude. Absolute magnitude uses a standard distance, and lower values indicate brighter stars."},{"text":"Absolute magnitude compares stars at a standard distance; lower values mean dimmer stars.","correct":false,"explanation":"The standard distance is correct, but the magnitude scale is reversed from this claim. Lower absolute magnitude values correspond to brighter stars, not dimmer ones."},{"text":"Absolute magnitude compares stars at a actual distance; lower values mean dimmer stars.","correct":false,"explanation":"Both filled terms confuse absolute magnitude with everyday expectations. It compares stars at a standard distance, and the reversed magnitude scale assigns lower values to brighter stars."}]},{"id":"1270a1aa-62a5-4107-a05e-0ec2836dd105","cardType":"basic","points":1,"front":"Which is brighter: absolute magnitude +4 or -2?","back":"-2.","mcqOptions":[{"text":"-2.","correct":true,"explanation":"Absolute magnitude uses an inverse scale, so a lower, more negative value represents a brighter star. Therefore, magnitude -2 is brighter than magnitude +4."},{"text":"+4.","correct":false,"explanation":"Choosing +4 treats the magnitude scale as increasing with brightness. The scale is reversed, so the lower value, -2, represents the brighter star."},{"text":"Both are equally bright.","correct":false,"explanation":"Equal brightness would require equal absolute magnitudes. Because -2 is lower than +4 on the inverse magnitude scale, the star with magnitude -2 is brighter."},{"text":"It cannot be determined.","correct":false,"explanation":"Absolute magnitude directly compares intrinsic brightness at a standard distance, so enough information is given. The lower magnitude, -2, identifies the brighter star."}]},{"id":"39548056-5608-4ff0-9b32-500d9ba033e2","cardType":"cloze","points":null,"front":"An HR diagram plots [ ] horizontally and [ ] vertically.","back":"An HR diagram plots surface temperature horizontally and absolute magnitude or brightness vertically.","mcqOptions":[{"text":"An HR diagram plots surface temperature horizontally and absolute magnitude or brightness vertically.","correct":true,"explanation":"A standard HR diagram places surface temperature along the horizontal axis and absolute magnitude or luminosity-related brightness along the vertical axis."},{"text":"An HR diagram plots absolute magnitude or brightness horizontally and surface temperature vertically.","correct":false,"explanation":"This swaps the standard axes. Surface temperature belongs on the horizontal axis, while absolute magnitude or brightness belongs on the vertical axis."},{"text":"An HR diagram plots surface temperature horizontally and apparent magnitude or brightness vertically.","correct":false,"explanation":"Apparent brightness depends on a star’s distance from Earth and is not the standard vertical quantity. HR diagrams use absolute magnitude or intrinsic brightness vertically."},{"text":"An HR diagram plots stellar mass horizontally and absolute magnitude or brightness vertically.","correct":false,"explanation":"Stellar mass is not the standard horizontal axis of an HR diagram. The horizontal axis shows surface temperature, with absolute magnitude or brightness vertically."}]},{"id":"830eec7a-8be4-4d6b-8b53-a989de43ae36","cardType":"basic","points":1,"front":"On an HR diagram, where are the hottest stars on the temperature axis?","back":"On the left.","mcqOptions":[{"text":"On the left.","correct":true,"explanation":"Temperature decreases from left to right on a standard HR diagram. Consequently, the hottest stars are found on the left-hand side of the temperature axis."},{"text":"On the right.","correct":false,"explanation":"Placing hot stars on the right assumes temperature increases conventionally across the axis. HR temperature scales run backwards, so the hottest stars are on the left."},{"text":"In the middle.","correct":false,"explanation":"The centre contains stars with intermediate surface temperatures rather than the hottest stars. On a standard HR diagram, the highest temperatures appear on the left."},{"text":"Across the whole axis.","correct":false,"explanation":"Surface temperature has a definite horizontal position and is not distributed independently of the axis. The hottest stars are located on the left of an HR diagram."}]},{"id":"71b4f58e-bbd9-4705-9c0d-468d6507aab0","cardType":"basic","points":2,"front":"How does the main sequence run on an HR diagram?","back":"From hot, bright top left to cool, dim bottom right.","mcqOptions":[{"text":"From hot, bright top left to cool, dim bottom right.","correct":true,"explanation":"Hot main-sequence stars have high luminosities and occupy the upper left, while cooler, less luminous main-sequence stars extend towards the lower right."},{"text":"From hot, bright top right to cool, dim bottom left.","correct":false,"explanation":"This incorrectly places hot stars on the right and cool stars on the left. The main sequence runs from the hot, bright top left to the cool, dim bottom right."},{"text":"From cool, bright top left to hot, dim bottom right.","correct":false,"explanation":"This reverses both temperature and brightness trends along the main sequence. It actually extends from hot, bright stars at the top left to cool, dim stars at the bottom right."},{"text":"From hot, dim bottom left to cool, bright top right.","correct":false,"explanation":"This associates hot stars with low brightness and cool stars with high brightness. Main-sequence luminosity generally rises with temperature, producing a top-left to bottom-right band."}]},{"id":"cc5f06fc-5739-4b59-b4ab-b221976d9cb7","cardType":"cloze","points":null,"front":"On an HR diagram, [ ] are upper right, while [ ] are lower left.","back":"On an HR diagram, red giants are upper right, while white dwarfs are lower left.","mcqOptions":[{"text":"On an HR diagram, red giants are upper right, while white dwarfs are lower left.","correct":true,"explanation":"Red giants are cool but highly luminous, placing them in the upper right. White dwarfs are hot but dim, so they occupy the lower left."},{"text":"On an HR diagram, white dwarfs are upper right, while red giants are lower left.","correct":false,"explanation":"This reverses the two regions. White dwarfs are hot and dim in the lower left, whereas red giants are cool and bright in the upper right."},{"text":"On an HR diagram, red giants are upper right, while red dwarfs are lower left.","correct":false,"explanation":"Red dwarfs are cool and dim, so they lie near the lower right rather than the lower left. Hot, dim white dwarfs occupy the lower-left region."},{"text":"On an HR diagram, blue supergiants are upper right, while white dwarfs are lower left.","correct":false,"explanation":"Blue supergiants are hot and bright, placing them towards the upper left rather than upper right. The upper-right region contains cool, bright red giants."}]},{"id":"ad30a91a-a096-4b18-9335-19fe567b50a5","cardType":"basic","points":1,"front":"Why are red giants bright despite cool surfaces?","back":"They are huge.","mcqOptions":[{"text":"They are huge.","correct":true,"explanation":"A red giant’s enormous surface area allows it to emit a large total amount of energy, even though each square metre of its cool surface emits relatively little."},{"text":"They are hot inside.","correct":false,"explanation":"A hotter interior supports stellar processes but does not directly explain the observed luminosity from a cool surface. Red giants are bright mainly because their surface area is huge."},{"text":"They are nearby.","correct":false,"explanation":"Being nearby can increase apparent brightness but cannot explain a red giant’s high intrinsic luminosity. Its great size provides a huge radiating surface area."},{"text":"They are very dense.","correct":false,"explanation":"Red giants are not especially dense because their outer layers are greatly expanded. Their brightness despite low surface temperature results from their enormous size."}]},{"id":"0dfd203f-b30f-4eec-8c6b-0e988e6a0b4d","cardType":"basic","points":1,"front":"Why are white dwarfs dim despite hot surfaces?","back":"They are small.","mcqOptions":[{"text":"They are small.","correct":true,"explanation":"A white dwarf has a very small radiating surface area. It can therefore have a high surface temperature while emitting relatively little total energy."},{"text":"They are distant.","correct":false,"explanation":"White dwarfs are intrinsically dim, so distance is not the explanation for their position on an HR diagram. Their low luminosity results from their small surface area."},{"text":"They are dense.","correct":false,"explanation":"White dwarfs are extremely dense, but density itself does not reduce their luminosity. Their dimness despite high temperature is caused by their very small size."},{"text":"They are cool.","correct":false,"explanation":"White dwarfs have hot surfaces, so describing them as cool contradicts the question. They remain dim because their small surface area limits total energy output."}]}]}],"examCountdown":{"examDate":"2027-05-25","paperLabel":"Paper 1"},"heading":"Stellar evolution","title":"Stellar evolution Flashcards","topbar":{"backHref":"/igcse/physics/edexcel/flashcards"},"topicSidebar":"$L36"}]}],"topicId":"e114007d-7acd-55b8-ab47-ac9b47827a7d","walled":"$L37"}],"$L38","$L39"]