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

Input: Consider Input: What is the title of the four-episode special of 'Doctor Who', made for the Red Nose Day telethon in the UK, broadcast in March 1999?

Output: doctor who


Input: Consider Input: Who was the only child vampire in Anne Rice`s novels?

Output: anne rice


Input: Consider Input: The children's toy Silly Putty was taken on board by the crew of which Apollo mission?


Output: apollo program