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

Example Input: Who wrote and recorded the original version of the song Blue Suede Shoes which was a hit single for Elvis Presley in 1955?
Example Output: blue suede shoes

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

Example Input: Which Norwegian dramatist wrote the plays A Doll's House and Ghosts?
Example Output:
ghosts