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

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

Example Input: What is the official language of the Dominican Republic?
Example Output: dominican republic

Example Input: 'The Dream of Gerontius' is the 1900 work of which English composer?
Example Output:
the dream of gerontius