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.
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Question: Category: HOLLYWOOD 
Clue: He came back as a kinder, gentler cyborg in 1991's "Terminator 2"

Answer: arnold schwarzenegger


Question: Category: NATURE STUDY 
Clue: This tall shrub is prized for the reddish dye obtained from its leaves that's used to color hair

Answer: henna


Question: Category: PRISONERS' SENTENCES 
Clue: His book "The Sixteenth Round: From Number 1 Contender to No. 45472" led the way to his release & a 1999 film

Answer:
rubin "hurricane" carter