premise: A small snowstorm came through a town.
initial: The school roof buckled under the weight.
counterfactual: The school roof buckled under the weight, knocking the janitor unconscious.
original_ending: A janitor climbed on top to inspect. The roof shook under the new weight. The janitor was frightened.
edited_ending: Another janitor leaned over him to inspect.The roof shook under some more weight.The janitor was frightened.<SEP>The assistant janitor called an ambulance and the fire department.The fire department said the roof was weakened by the weight of the snow.The janitor made a quick recovery.<SEP>A different janitor climbed on top to inspect.The roof shook under the new weight.The janitor was frightened and ran off.