Task: Story Composition
Input (English): Premise: Katherine's daughter and son-in-law visited over Easter weekend. 
 Initial Context: They brought their cat, Lucas. 
 Original Ending: Katherine's dog, Zeus, wanted to play with Lucas. Caitlin, Katherine's daughter, tried to introduce Lucas to Zeus. Lucas grabbed Zeus' nose and scratched him. 
 Counterfactual Context: They brought their frog, Lucas.
Output (English): Katherine's dog, Zeus, wanted to play with Lucas. Caitlin, Katherine's daughter, tried to introduce Lucas to Zeus. Lucas hopped on Zeus' back and sat there eating flies.