In this task, you will be given a short story or summary of a situation which is called a premise. Your task is to generate a question based on the given premise. The generated question (i) must be unambiguous, (ii) must be relevant to the premise, (iii) should require commonsense reasoning to get answered. You should not use any outside knowledge to generate the question.

The circle opens the door for the big triangle.
Why does the circle do this?

A triangle is alone in the house not moving. A circle enters the door of the house and nudges the triangle.
The triangle starts moving around. What just happened?

A small triangle and a circle stand outside the room. A big triangle comes outside and all three of the shapes begin strolling together.

Why were the small triangle and the circle standing outside the room?