TASK DEFINITION: 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.
PROBLEM: Category: FICTIONAL CHARACTERS 
Clue: Lassiter is the gun-slinging hero of this Zane Grey novel & appears in its sequel "The Rainbow Trail"

SOLUTION: "riders of the purple sage"

PROBLEM: Category: VINCENT 
Clue: With Curt Gentry, he wrote "Helter Skelter: The True Story of the Manson Murders"

SOLUTION: vincent bugliosi

PROBLEM: Category: SCIENCE & NATURE 
Clue: This physicist known for his "uncertainty principle" was one of the founders of quantum mechanics

SOLUTION:
werner heisenberg