Task: Story Composition
Input (English): Premise: Sam was standing on a bridge over a stream. 
 Initial Context: He picked up a rock and threw it in. 
 Original Ending: The rock made a small splash. Sam looked for a bigger rock to throw in. He found a very large rock but he was too weak to lift it. 
 New ending: He threw a rock that made a small splash. Sam looked for a bigger rock to throw in. He found a larger rock but he was too weak to lift it. 
Output (English): he was trying to learn how to skip rocks.