Task: Story Composition
Input (English): Premise: Leon and Seth had always been rivals. 
 Initial Context: One day, Seth challenged Leon to a chess game. 
 Original Ending: Leon didn't know how to play chess, but practiced every day. Seth knew Leon didn't know how to play and assumed Leon would lose. Leon won the chess game in record time. 
 New ending: Leon was disappointed as he had wanted to practice chess with Seth. Seth didn't know Leon didn't know how to play and Seth didn't want to lose. Leon would not have won the chess game. 
Output (English): One day, Seth rejected Leon to a chess game.