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

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

Example Input: With what sport is Dennis Compton associated?
Example Output: denis compton

Example Input: Colin Meads, nicknamed 'Pinetree', a former rugby union footballer who played 55 test matches for his national team from 1957 until 1971 and was named his country's Player of the Century, represented which country?
Example Output:
colin meads