Task: Story Composition
Input (English): Premise: Grady went tubing behind a boat. 
 Initial Context: The boat went very fast. 
 Original Ending: Grady was thrown off the tube. He did not remember how he got back into the boat. Grady hit his head very hard. 
 New ending: Grady was sunk with the tube. He did not remember how he got back onto the shore. Grady hit his head very hard. 
Output (English): The boat sank before he got very far.