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

Ex Input:
Formerly known as Sky Dome, Rogers Centre is home to what American League baseball team, the only MLB team located outside the United States?

Ex Output:
american league


Ex Input:
Which chemical element is named after the Latin for Copenhagen where it was discovered?

Ex Output:
copenhagen


Ex Input:
Which British Prime Minister introduced income tax, to help offset a reduction in revenue caused by a decline in trade?

Ex Output:

prime minister of the united kingdom