TASK DEFINITION: You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).
PROBLEM: concept: Illinois answers: ['Chicago']

SOLUTION: what are the biggest cities in illinois?

PROBLEM: concept: London answers: ['Trafalgar Square']

SOLUTION: what is the center of london called?

PROBLEM: concept: Aurora answers: ['2012 Aurora shooting']

SOLUTION:
when did the aurora colorado shooting take place?