Task: Story Composition
Input (English): Premise: Bob was concerned about his old water heater. 
 Initial Context: He didn't have the money to afford a new one. 
 Original Ending: Bob called a plumber to inspect it. The plumber replaced the rod and said it should last another decade. Bob was very relieved he didn't have to replace the whole heater. 
 New ending: Bob called a plumber to inspect it. The plumber replaced some parts and said it should improve the efficiency. Bob was very relieved he didn't have to replace the whole heater. 
Output (English): He did not think that it was very energy efficient.