Task: Story Composition
Input (English): Premise: Mark and his brother Keith took a trip to Alaska. 
 Initial Context: They explored mountains and rode a scenic train. 
 Original Ending: Keith took pictures while Mark explored caves. Keith dropped his camera when he saw a bear. He bought a new one at the souvenir shop. 
 New ending: Keith took pictures while Mark fished. Keith dropped his camera when he saw a bear. He bought a new one at the souvenir shop. 
Output (English): They rented a small cabin on a lake and spent the rest of the trip fishing.