Task: Story Composition
Input (English): Premise: Throughout Peter's math class, he had a bad headache. 
 Initial Context: Although it was hard for him to pay attention, he tried to be calm. 
 Original Ending: However, he had to leave 45 minutes before the end of class. His friend decided to look for him. He found peter, throwing up in the bathroom. 
 Counterfactual Context: Although it was hard for him to pay attention, he stayed for the whole class.
Output (English): However, 45 minutes later he had to leave his next class. His friend decided to look for him. He found peter, throwing up in the bathroom.