instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
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?
answer:
incandescent light bulb


question:
Which cyclist won the first medal for Team GB at the 2012 Olympic Games?
answer:
gb


question:
In which European capital is Bromma Airport?
answer:

stockholm bromma airport