instruction:
You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
question:
Category: SAME FIRST & LAST LETTER 
Clue: It's the last name of TV's SpongeBob
answer:
squarepants


question:
Category: BELCHING 
Clue: Before a volcano belches it forth, it's called magma
answer:
lava


question:
Category: PHYSICS 
Clue: This measure is used for radioactive decay because the time for all atoms to break down is unknowable
answer:

half-life