instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who played the character Gene Hunt in the UK TV series 'Life on Mars' and 'Ashes to Ashes'?
answer:
life on mars


question:
The Battle of Poltava in 1709 was a victory by Peter the Great over which state?
answer:
battle of poltava


question:
Due to its use for many years in the company advertising, what breed of dog is often known as?
answer:

dog