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

Basil Rathbone made 14 Sherlock Holmes films. Who played the part of Dr Watson?
watson

Which film was based on the story The Sentinel by Arthur C Clarke?
arthur c. clarke

In which US city did the 2004 remake of the film Alfie take place?

united states