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

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

Example Input: In 1459, the Battle of Blore Heath in Staffordshire, England, 2 miles east of Market Drayton in Shropshire, was the first major battle of which campaign?
Example Output: england

Example Input: Born in 1921, who connects 'Are You Being Served' with 'Last of the Summer Wine'?
Example Output:
last of the summer wine