Task: Story Composition
Input (English): Premise: My three year old son and I decided to mow the lawn. 
 Initial Context: We checked the oil and filled the gas tank. 
 Original Ending: 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. 
 Counterfactual Context: The lawn mower would not start so we gave up.
Output (English): The next weekend I fixed the mower, and while mowing, my son 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.