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 consistency, answers should be in all lower cased letters.
question:
Category: INSECTOID RHYME TIME 
Clue: A London apartment for a small biting fly
answer:
a gnat flat


question:
Category: COLORFUL LANGUAGE 
Clue: A karate kid may aspire to this high rank, kuroi-obi in Japanese
answer:
a black belt


question:
Category: TECHNOLOGY 
Clue: In 1835 C.S.A. Thilorier froze this gas to create the first "dry ice"
answer:

carbon dioxide