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

Input: Consider Input: In book and film, which vessel was commanded by Charlie Allnut?

Output: charlie allnut


Input: Consider Input: Which major river has its source at the confluence of the rivers Brigach and Breg in the Black Forest?

Output: breg


Input: Consider Input: Which rock band did Dave Gilmour join in 1967?


Output: david gilmour