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

Input: Consider Input: Which Union leader of the American Civil War gave his name to a tree in California's 'Sequoia National Park'?

Output: american civil war


Input: Consider Input: In 1959, for which film did David Niven win his only Academy Award?

Output: david niven


Input: Consider Input: Which member of the British royal family married on the 29th April 2011?


Output: british royal family