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

Ex Input:
Charlie Chaplin who died on Christmas Day in 1977, co founded which film studio along with Mary Pickford, Douglas Fairbanks?

Ex Output:
douglas fairbanks

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:
Which British king, famous for his string of mistresses, had an arranged marriage to Caroline of Brunswick His first words to her were I am not well, pray get me a glass of Brandy. He did not accede to the throne until he was 57, when he was described as a bloated ruin.?

Ex Output:
caroline of brunswick