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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: THE 1930s
Clue: On September 18, 1934 the Soviet Union joined this international organization

SOLUTION: league of nations

PROBLEM: Category: DUMB GUYS' GREATEST INVENTIONS
Clue: Dumb guys think it's cool they get to slide their own credit card at the store; even cooler? This word for "slide"

SOLUTION: swipe

PROBLEM: Category: 5-SYLLABLE WORDS
Clue: From the Greek for "thief", it's someone who suffers from an irresistible impulse to steal

SOLUTION:
a kleptomaniac