Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: My three year old son and I decided to mow the lawn. We checked the oil and filled the gas tank. He sat on my lap and played his Ipod while I drove. I noticed he had stopped playing after a few minutes. I looked down and he was sound asleep in my lap.
 selected sentence: I noticed he had stopped playing after a few minutes.

My three year old played with his ipod >Causes/Enables> He stopped playing after a few minutes