Task: Story Composition
Input (English): Premise: Tom had a big lawn with tall grass. 
 Initial Context: He got the lawnmower out and started to mow. 
 Original Ending: The lawnmower ran out of gas. Tom went to the store to get more gas. He finished mowing the lawn. 
 New ending: Their lawnmower ran out of gas. Tom went to the store to get more gas for them. They finished mowing the lawn. 
Output (English): He called the lawnmowing service he had hired to come mow.