8470
Instead , xenon is formed during supernova explosions , in classical nova explosions , by the slow neutron-capture process ( s-process ) in red giant stars that have exhausted their core hydrogen and entered the asymptotic giant branch , and from radioactive decay , for example by beta decay of extinct iodine-129 and spontaneous fission of thorium , uranium , and plutonium .
 astronomical object: supernova; astronomical object: nova; astronomical object: red giant
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Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 astronomical object: supernova; astronomical object: nova; astronomical object: red giant