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.

[Q]: Category: THE QUOTABLE EINSTEIN 
Clue: This "is more important than knowledge"
[A]: imagination


[Q]: Category: ARCHITECTS 
Clue: Dallas-Fort Worth Airport architect Gyo Obata helped design this Smithsonian museum
[A]: air & space museum


[Q]: Category: TOUGH FACTS 
Clue: Spanky was part of "Our Gang" & Jiang Qing, Mao's widow, was part of this gang
[A]:
the gang of four