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

Ex Input:
Who composed 'Eine Kleine Nachtmusik' in the 18th Century?

Ex Output:
eine kleine nachtmusik


Ex Input:
In 1867 who became the first Prime Minister of Canada?

Ex Output:
prime minister of canada


Ex Input:
What is the Alaskan terminus of the Alaskan Highway?

Ex Output:

alaska