TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What is the name of the astromech droid companion of Anakin Skywalker, Luke Skywalker and Obi-Wan Kenobi in the Star Wars franchise?

SOLUTION: droid

PROBLEM: Which US state was the title of a no. 1 hit for the Bee Gees in 1967?

SOLUTION: bee gees

PROBLEM: In which British city was the pharmacy chain Boots established in 1849?

SOLUTION:
boots uk