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

Example Input: Which engineer built the Menai Suspension Bridge and the Caledonian Canal?
Example Output: menai suspension bridge

Example Input: What did Edwin Land invent because of his daughters' wish for instant and 'snappy' results?
Example Output: edwin h. land

Example Input: Which author's first works were published under the name Currer Bell?
Example Output:
charlotte bronte