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

Input: Consider Input: Who has written a series of novels, entitled The Dark Tower, of which the first, in 1982, was entitled, The Gunslinger?

Output: the dark tower


Input: Consider Input: Which two brothers had hits with Cathy's Clown and Wake Up Little Susie?

Output: cathy's clown


Input: Consider Input: Which TV actor provided the voice for Bob the Builder on his number one hit?


Output: bob the builder