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

Ex Input:
Auld Reekie is the nickname for which Scottish city?

Ex Output:
auld reekie


Ex Input:
Which singer played Billie Holiday in the 1972 film `Lady Sings The Blues`?

Ex Output:
lady sings the blues


Ex Input:
Which alliteratively-named politician served as Abraham Lincoln's Vice-President between 1861 and 1865?

Ex Output:

abraham lincoln