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.
Q: A circle is standing still. A triangle approaches from the opposite direction and then stops. The circle turns around.
A: 
Why does the circle turn around?