Task: Story Composition
Input (English): Premise: Charles was a very serious man and didn't laugh a lot. 
 Initial Context: His friends tried to tell jokes but he remained untouched. 
 Original Ending: To make him lose his composure, his friends decided to trick him. They invited him to a conference which was in a fact a clown party. Charles wasn't happy, but a smile turned the corner of his lips. 
 Counterfactual Context: His friends told jokes that really make him laugh hysterically.
Output (English): To make him laugh even more, his friends decided to trick him. They invited him to a conference which was in a fact a clown party. Charles wasn't happy, but a smile turned the corner of his lips.