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: POLITICAL PHILOSOPHY 
Clue: The subtitle of this influential 1762 treatise is "Principes du droit politique" ("Principles of Political Right")

SOLUTION: the social contract

PROBLEM: Category: AUTHORS 
Clue: He died in 1995, the day before the opening of a Glasgow veterinary library named for him

SOLUTION: james herriot

PROBLEM: Category: FAMOUS NAMES 
Clue: DNA from Prince Philip helped prove that Anna Anderson-Manahan was not this woman, as she had claimed

SOLUTION:
anastasia