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

Which SF author wrote The Day it Rained Forever?
the day it rained forever

In which city were the 1912 Olympic games held Oslo, Antwerp or Stockholm?
1912 summer olympics

Who painted The Card Players, at Feb 2012 the most expensive artwork in the world?
the card players