Task: Story Composition
Input (English): Premise: Mack was a large black lab puppy. 
 Initial Context: He slept in bed with me every night, but his gas was terrible. 
 Original Ending: One night, his gas was so atrocious that I moved to the couch to sleep. I could smell it all the way into the living room. Eventually he joined me on the couch. 
 Counterfactual Context: He slept on the couch every night because his gas was terrible.
Output (English): One night hsi gas was so atrocious that I moved him to another room to sleep. I could smell it all the way into my bedroom. Eventually he joined me in my bed.