Task: Story Composition
Input (English): Premise: Sam asked if he could live with his aunt. 
 Initial Context: He was at her house all the time. 
 Original Ending: She took him to the zoo. She bought him a stuffed giraffe. She let him touch the stingrays. 
 Counterfactual Context: She said no.
Output (English): She took him to the zoo instead. She bought him a stuffed giraffe. She let him touch the stingrays.