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

Example Input: Who is the BBC's political editor?
Example Output: bbc

Example Input: Aldebaran is the brightest star in which constellation?
Example Output: aldebaran

Example Input: In which Bond film does Britt Ekland play the character of Mary Goodnight?
Example Output:
britt ekland