Task: Story Composition
Input (English): Premise: Sam went to the pool. 
 Initial Context: He was swimming with his friends. 
 Original Ending: They played many games in the water. Then they took a break and ate. Sam had so much fun. 
 Counterfactual Context: He was swimming by himself.
Output (English): Then his friends joined him and they played many games in the water. Then they took a break and ate. Sam had so much fun.