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: ANIMAL PLANET? 
Clue: In gymnastics, it's safe to vault over; its body is upholstered
answer:
horse


question:
Category: ANCIENT GREEKS 
Clue: This actor of the 6th century B.C. is credited with introducing the use of masks on stage
answer:
thespis


question:
Category: MAKE IT "SO" 
Clue: The law officer of the U.S. government just below the Attorney General
answer:

a solicitor general