Task: Story Composition
Input (English): Premise: Tanya wasn't too sure about this. 
 Initial Context: She had signed up for the aerobics class but was now nervous. 
 Original Ending: All the other people in the room looked so fit. She tentatively began the aerobics class. Before she knew it she was having a blast. 
 New ending: All the other people in the room looked so fit. She tentatively began the yoga class. Before she knew it she was having a blast. 
Output (English): She had signed up for the yoga class but was now nervous.