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

Ex Input:
Harry, Tom, Dougie and Danny are collectively known as who in the pop world?

Ex Output:
dougie poynter


Ex Input:
What name is given to the murder of 7 people as part of a Prohibition Era conflict between the South Side Italian gang led by Al Capone and the North Side Irish gang led by Bugs Moran in Chicago, Illinois, in 1929?

Ex Output:
bugs moran


Ex Input:
Bobby Darin and The Four Tops had top ten hits with which song?

Ex Output:

bobby darin