Task: Story Composition
Input (English): Premise: A farmer was plowing his field when his plow hit something. 
 Initial Context: The farmer thought he had hit a rock, so he needed to dig it out. 
 Original Ending: When he started digging, he found that it was a big bone. A paleontologist came and excavated a mammoth's bone. The farmer donated the mammoth bone to a university museum. 
 New ending: He found that it was a gemstone. A rock specialist came and excavated the huge gemstone. The farmer donated the gemstone to a university museum. 
Output (English): The farmer dug and found a huge rock.