Task: Story Composition
Input (English): Premise: Paul loved going to museums. 
 Initial Context: He went to the science museum downtown to see the dinosaurs. 
 Original Ending: His favorite was the t-rex. He like to imagine them stomping across the ground. He bought a dinosaur toy at the gift shop. 
 Counterfactual Context: He went to the History museum to see the cival war re-enactment.
Output (English): His favorite was Lincoln's speech at Gettysburg He liked to imagine himself giving the speech. He bought a book at the gift shop