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 name of the main thoroughfare in Barcelona, which runs from the Placa de Catalunya to the sea?

Output: barcelona


Input: Consider Input: Alexander the Great died in which ancient city?

Output: alexander the great


Input: Consider Input: Who in 2008 was re-elected Prime Minister of Canada?


Output: prime minister of canada