Task: Story Composition
Input (English): Premise: Tito challenged his dad to a tennis match. 
 Initial Context: He was only 12 and he was sure his dad would win. 
 Original Ending: But he made his dad promise not to go easy on him anyways! Then the two males started playing tennis. To Tito's surprise, he beat his dad! 
 Counterfactual Context: He was stronger than his dad and was sure he would win.
Output (English): But he made his dad promise to play his hardest with him anyways. Then the two males started playing tennis. To Tito's surprise, his dad beat him.