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

In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?
achilles

In which country was actor Basil Rathbone born?
basil rathbone

Who composed the ballet, Daphnis et Chloe and a Piano Concerto for the Left Hand?

piano concerto for the left hand