instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
To which actress is Daniel Craig married?
answer:
daniel craig


question:
Who did boxer Floyd Patterson defeat to regain the Heavyweight Championship in June 1960?
answer:
boxing


question:
Anna Nicole Smith gained notoriety after her short lived marriage to what Texas oil billionaire sparked a major court case, which continues to this day?
answer:

anna nicole smith