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: VINCENT 
Clue: With Curt Gentry, he wrote "Helter Skelter: The True Story of the Manson Murders"
answer:
vincent bugliosi


question:
Category: FICTIONAL BATTLES & WARS 
Clue: Juan Rico joins the mobile infantry to fight in the war against the invading alien "bugs" in this Heinlein novel
answer:
starship troopers


question:
Category: WEIRD HISTORY 
Clue: In the first of several marriages, this English king married his sister-in-law in 1509
answer:

henry viii