Task: Story Composition
Input (English): Premise: Rachael and Kristy were best friends. 
 Initial Context: Rachael was dating a boy named Mark. 
 Original Ending: Mark broke up with Rachel for no reason. The next week Mark and Kristy started dating. Rachael and Kristy are no longer best friends. 
 New ending: Mark broke up with Kristy for no reason. The next week Mark and Rachael started dating. Rachael and Kristy are no longer best friends. 
Output (English): Kristy was dating a boy named Mark.