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

Input: Consider Input: Which popular Doctor Who villains, it was revealed in 2011, are to be given 'a rest' by scriptwriters?

Output: doctor who


Input: Consider Input: Who composed 'Belshazzar's Feast' cantata?

Output: belshazzar's feast


Input: Consider Input: Arturo Frondizi became president of which South American country in May 1958?


Output: arturo frondizi