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

Example Input: Which TV screenwriter created the science fiction shows, Survivors and Blake's Seven?
Example Output: blake's 7

Example Input: Which `brothers` had a number one hit in May 1958 with `All I Have To Do Is Dream`?
Example Output: all i have to do is dream

Example Input: What was Cliff Richard's first UK top ten hit?
Example Output:
cliff richard