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

[EX Q]: Which Union leader of the American Civil War gave his name to a tree in California's 'Sequoia National Park'?
[EX A]: american civil war

[EX Q]: Which team lost the 2009 Superbowl to the Pittsburgh Steelers?
[EX A]: super bowl xliii

[EX Q]: 'The Codex Leicester' (or Codex Hammer) is a collection of mostly scientific writings by which scientist/inventor?
[EX A]:
codex leicester