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

Ex Input:
Who had a hit album with Back to Bedlam in 2005?

Ex Output:
back to bedlam


Ex Input:
Which `brothers` had a number one hit in May 1958 with `All I Have To Do Is Dream`?

Ex Output:
all i have to do is dream


Ex Input:
In which of the constellations of the Zodiac is the star Aldebaran found?

Ex Output:

aldebaran