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 won the 2011 Booker Prize for 'The Sense of an Ending'?

Output: the sense of an ending


Input: Consider Input: Which analgesic drug, first isolated in 1804, was named after the Greek god of dreams ?

Output: analgesic


Input: Consider Input: In which country does the river Amazon rise?


Output: amazon