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

Example Input: With which song did Swedish pop group Abba win the 1974 Eurovision Song Contest?
Example Output: abba

Example Input: Which European country contains the ski resorts of Davos and Klosters?
Example Output: klosters

Example Input: Which US tennis player won the Australian, Wimbledon and French Women's Singles in 1999, also the Gold Medal at the 1996 Atlanta Olympic Games?
Example Output:
wimbledon