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 DETECTIVES 
Clue: "The House Without a Key" was the first case solved by this Chinese detective

SOLUTION: charlie chan

PROBLEM: Category: ARCHITECTS 
Clue: Dallas-Fort Worth Airport architect Gyo Obata helped design this Smithsonian museum

SOLUTION: air & space museum

PROBLEM: Category: SOUPS OF THE WORLD 
Clue: Gazpacho

SOLUTION:
spain