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

Example Input: The most northerly part of mainland Australia is in which state?
Example Output: australia

Example Input: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?
Example Output: dale dike reservoir

Example Input: What is the name of the clarified butter used in Indian cookery?
Example Output:
clarified butter