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

Example Input: What is the capital of the US state of California?
Example Output: california

Example Input: Who won the Women's Singles at the 2015 Australian Open Tennis Championships?
Example Output: the championships, wimbledon

Example Input: Which Russian man won both the 100 and 200m gold medals at the 1972 Olympic Games?
Example Output:
1972 summer olympics