instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which film actor (1895-1926) is known for his films The Four Horsemen, The Sheik and Blood And Sand?
answer:
blood and sand


question:
Will you still be sending me a valentine is a line from which Beatles song?
answer:
the beatles


question:
Which American president was assassinated by Charles Guiteau in 1881?
answer:

charles j. guiteau