Task: Story Composition
Input (English): Premise: It was going to be the boy's first time fishing. 
 Initial Context: He put his rod and reel in his dad's truck and climbed in. 
 Original Ending: His dad drove them down to the river. His dad showed him how to cast his line. He had a great day with his father. 
 Counterfactual Context: He and his dad walked down to the river.
Output (English): His dad led him down to the river. His dad showed him how to cast his line. His dad showed him how to cast his line.