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

Which city has sports teams known as the 'Maple Leafs' and the 'Blue Jays'?
toronto blue jays

The site of the 1461 Battle of Mortimer's Cross lies in which English county?
battle of mortimer's cross

Which genus of plants includes busy lizzie and touch-me- not?

impatiens walleriana