Task: Story Composition
Input (English): Premise: An archeologist was studying some old ruins. 
 Initial Context: His team discovered an old tunnel and decided to explore it. 
 Original Ending: When they entered the tunnel, they found a large barrier. They grabbed some dynamite and blew the entrance open. When they opened the wall, they saw that the tunnel was empty. 
 New ending: If they had entered the tunnel, they would have found a large barrier. They would have had to take some dynamite and blow the entrance open. The tunnel was empty anyway. 
Output (English): They knew of a tunnel, but were unable to access it.