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

In which city will the 2014 Tour de France begin?
2014 tour de france

'Highway 61 Revisited' and 'Blood On The Tracks' were both albums released by which popular singer?
highway 61 revisited

Who is the Greek equivalent of Aurora, the Roman Goddess of the Dawn?

aurora