Task: Story Composition
Input (English): Premise: Cassie's dog Rufus had a favorite squeaky toy, which was bright red. 
 Initial Context: He could play with it all day, and very often did! 
 Original Ending: One day they were picnicking, and Cassie threw the toy for Rufus. It flew into the creek, and Rufus immediately leapt after it. Cassie was frantic until he was out, but Rufus cared only for his toy. 
 New ending: One day they were picnicking, and Cassie rolled the toy for Rufus. It rolled into the creek, and Rufus immediately leapt after it. Cassie was frantic until he was out, but Rufus cared only for his toy. 
Output (English): He could play with it all day, and very often did but will never throw the toy.