Task: Story Composition
Input (English): Premise: John and his father decided to build a robot. 
 Initial Context: They went the store and bought parts. 
 Original Ending: John's father taught John how to wire together the parts. It took all weekend, but they finished the robot! John and his father happily watched the robot move around. 
 Counterfactual Context: They went the store but couldn't find parts.
Output (English): John's father can't taught John how to wire together the parts. It took all weekend to find the parts but they finished the robot! John and his father happily watched the robot move around.