Task: Story Composition
Input (English): Premise: Derrick knew today was the day. 
 Initial Context: He was going to buy his new stereo today and was pumped. 
 Original Ending: Derrick had looked over all the models and found the one he wanted. He drove to the store, very happy. He got his new stereo and it sounded fantastic. 
 New ending: Derrick had looked over all the breeds and found the one he wanted. He drove to the store, very happy. He got his puppy. 
Output (English): He was going to buy a new puppy and was pumped.