Task: Story Composition
Input (English): Premise: It was Dave's 25th birthday. 
 Initial Context: He wanted to celebrate with his best friends. 
 Original Ending: They decided to go to the casino. At the casino, Dave won a million dollars! Dave invested his money into a high interest savings account. 
 Counterfactual Context: He wanted to celebrate quietly at home.
Output (English): He bought himself a lotto ticket. Dave won a million dollars! Dave invested his money into a high interest savings account.