Task: Story Composition
Input (English): Premise: Billy loved fire trucks for as long as he could remember. 
 Initial Context: The class was going to take a field trip to the fire house. 
 Original Ending: Billy was very excited. The class arrived at the firehouse. Billy had a great time that day. 
 Counterfactual Context: Billy got the measles so he missed the class field trip and was very sad.
Output (English): Billy was very upset. The class arrived at the firehouse. Billy had an awful time that day at home while seeing pictures of his friends at the firehouse.