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

Input: Consider Input: Court Philippe Chatrier, which has stands named after Jacques Toto Brugnon, Jean Borotra, Henri Cochet, and Ren Lacoste, is the main court of an international tennis venue in which city?

Output: stade roland garros


Input: Consider Input: Kronos (or Cronus) was the Greek equivalent of which Roman god?

Output: cronus


Input: Consider Input: What is the name of Dr Who's time machine?


Output: doctor who