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

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

In which war did the Sack of Badajoz takeplace?
siege of badajoz

Detective Inspector Edmund Reid, Bennet Drake and Captain Jackson are characters in which TV crime series?

bennet drake