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: THE YOU-NIVERSE 
Clue: Containing 33 vertebrae, it's also known as the vertebral column
the spine

Category: SPORTS AUTOBIOGRAPHIES 
Clue: This coach's book is all "Tark"
jerry tarkanian

Category: RIMBAUD 
Clue: Done with poetry at age 20, Arthur moved to Africa & sold guns to Menelik, future emperor of this country

ethiopia