Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: Who won the Women's Singles at the 2015 Australian Open Tennis Championships?

Answer: the championships, wimbledon


Question: Who bad a number 1 in the 1980's with Circle in the Sand?

Answer: circle in the sand


Question: Actress Betty Joan Perske is better known by what name?

Answer:
betty joan perske