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

Ex Input:
Who was in the films Zelig, Stardust Memories, and Broadway Danny Rose?

Ex Output:
broadway danny rose


Ex Input:
What American swimmer won eight gold medals at the 2008 Olympics?

Ex Output:
2008 summer olympics


Ex Input:
Which west African has the 'Cedi' as its unit of currency?

Ex Output:

ghanaian cedi