Task: Story Composition
Input (English): Premise: Sam ran through the empty office to his cubicle. 
 Initial Context: He forgot his briefcase at his desk. 
 Original Ending: He knocked over a stack of papers and tripped to the ground. He lay there for a while and contemplated not getting up. Sam got up and kicked the papers around even more. 
 Counterfactual Context: He forgot his phone at his desk.
Output (English): He knocked over a stack of papers and tripped to the ground. He lay there for a while and contemplated not getting up. Sam got up and kicked the papers around even more, then went back for his phone.