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

Ex Input:
The Greeks called her Athena, what was the Roman name for this Goddess?

Ex Output:
athena

Ex Input:
Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?

Ex Output:
arthur wellesley, 1st duke of wellington

Ex Input:
Which Australian Prime Minister famously disappeared whilst swimming off the coast of Victoria on December 17th 1967?

Ex Output:
australia