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: INVENTORS & INVENTIONS 
Clue: Invented by Philip Drinker in the 1920s, this closed respirator is used by patients who can't breathe on their own

SOLUTION: an iron lung

PROBLEM: Category: OFFICIAL STATE FOOD & DRINK 
Clue: Also called a filbert, it's Oregon's state nut

SOLUTION:
a hazelnut