Task: Story Composition
Input (English): Premise: Bee was nervous to go on vacation. 
 Initial Context: He had a big aquarium and he was worried about his fish. 
 Original Ending: He put the vacation feeder in the tank and left, still worried. The whole trip, he fretted about his fish. But when he got home, there they were, happy and healthy as always! 
 New ending: He put the vacation feeder in the tank and left, still worried. The whole trip, he fretted about his iguana. But when he got home, it was happy and healthy as always! 
Output (English): He had an iguana he was worried about.