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 SI unit of capacitance?
Example Output: capacitance

Example Input: On January 26, 1879, who was granted a patent for r an electric lamp using a carbon filament or strip coiled and connected to platina contact wires?
Example Output: incandescent light bulb

Example Input: Who is the current Australian prime minister ?
Example Output:
australia