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

Ex Input:
Which strong man appears in the Bible in the Book of Judges?

Ex Output:
book of judges


Ex Input:
Who played the character Gene Hunt in the UK TV series 'Life on Mars' and 'Ashes to Ashes'?

Ex Output:
life on mars


Ex Input:
In which was did the Battle of the Somme take place?

Ex Output:

battle of the somme