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

Example Input: What is the capital of the U.S. state of Connecticut?
Example Output: connecticut

Example Input: Which 20th century British prime minister had the longest surname ?
Example Output: prime minister of the united kingdom

Example Input: To which genus of plants do Sweet William and Carnations belong?
Example Output:
dianthus caryophyllus