Task: Story Composition
Input (English): Premise: Rob had always wanted to join the Marines. 
 Initial Context: He knew it would be quite difficult, but believed in his dream. 
 Original Ending: He spent all his free time preparing and joined ROTC. When he turned 18, Rob immediately started the process of joining. He was never happier than on the day he completed training. 
 Counterfactual Context: He couldn't because of a heart condition.
Output (English): He spent all his free time preparing and joined ROTC, but then was kicked out. When he turned 18, Rob immediately started working in an office. He was never happy.