Task: Story Composition
Input (English): Premise: Megan took her dog to the park. 
 Initial Context: He ran like a wild one after the birds. 
 Original Ending: She had to chase after him. He took off with the leash. He then pulled Megan through the pond at the park. 
 Counterfactual Context: Her dog was afraid of all the other dogs at first but calmed down and started to play with them.
Output (English): He started running after birds and she had to chase after him. He took off with the leash. He then pulled Megan through the pond at the park.