Task: Story Composition
Input (English): Premise: Zack is riding his skateboard down the sidewalk. 
 Initial Context: A running is coming toward him. 
 Original Ending: Zack stops and moves into the grass. The runner runs by Zack and waves. Zack begins riding again. 
 New ending: Zack stops and moves into the grass. The bicyclist rides by Zack and waves. Zack begins riding again. 
Output (English): A bicyclist is coming toward him.