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.

Category: MUSICAL INSTRUMENTS 
Clue: Newly discovered, perhaps the oldest playable instrument is one of these, made from a crane's bone
flute

Category: U.S. GOVERNMENT 
Clue: This group that first met in 1942 didn't get a permanent chairman until 1949
the joint chiefs of staff

Category: 5-LETTER LITERARY TERMS 
Clue: The "History" by Herodotus has been called the earliest surviving European work of this form, from Latin for "straightforward"

prose