instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In America, as what was Bill Shoemaker famous?
answer:
bill shoemaker


question:
Which former Blue Peter presenter died in April 2004, aged 41?
answer:
blue peter


question:
Who is credited with inventing the Cotton Gin in 1793?
answer:

cotton gin