Task: Story Composition
Input (English): Premise: Some kids were playing by the creek. 
 Initial Context: One found a large stone tablet in the riverbed. 
 Original Ending: They cleaned it up and took it home. One kid's dad said that it looked like an antique. They took it to their history teacher to find out. 
 Counterfactual Context: One found some fish by the riverbed.
Output (English): They cleaned it up and took it home. One kid's dad said that it looked like a rare species. They took it to their biology teacher to find out.