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: WORD ORIGINS 
Clue: Like the name of a minor Roman god, this word for a caretaker comes from the Latin for "door"

SOLUTION: janitor

PROBLEM: Category: HISTORIC NAMES 
Clue: This "Dragon" was first famous for resisting Ottoman domination of Romania

SOLUTION: vlad the impaler

PROBLEM: Category: RULERS 
Clue: Last name of the last man to sit in power on the Peacock Throne

SOLUTION:
pahlevi