Task: Story Composition
Input (English): Premise: Tom saw a friendly dog while walking through the city. 
 Initial Context: He decided he wanted a dog of his own. 
 Original Ending: He visited an animal shelter. He looked at every dog. He took home a great dog and made a new best friend. 
 Counterfactual Context: He wanted a dog but knew he couldn't take care of one.
Output (English): He visited an animal shelter. He petted every dog. He can only imagine taking home a great dog and becoming best friends with it.