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

Ex Input:
Which popular animated characters, first seen in 1996 include many different characters including ones called Ash Ketchum, Tracy Sketchit and Gar Oak?

Ex Output:
tracy


Ex Input:
After Harold McMillan who was Britain's next Prime Minister?

Ex Output:
britain


Ex Input:
Which 1993 film is about the affair between author C S Lewis and poet Joy Grisham?

Ex Output:

c. s. lewis