Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: Although it was headquartered at Oak Ridge, TN, and the University of Chicago, what was the name of the WWII project that created the atomic bomb?
[EX A]: nuclear weapon

[EX Q]: Which Irish boxer was nicknamed the Clones Cyclone?
[EX A]: boxing

[EX Q]: Who in May 1935 for Boston Braves played his last career baseball game?
[EX A]:
boston braves