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

Ex Input:
Who won the Women's Singles at the 2015 Australian Open Tennis Championships?

Ex Output:
the championships, wimbledon


Ex Input:
Which mountain range extends through Morocco, Tunisia and Algeria, with its highest peak at Mount Jebel Toubkal?

Ex Output:
tunisia


Ex Input:
Which writer created the Detective Alex Cross?

Ex Output:

alex cross