premise: Pam's house was where the party was.
initial: Everyone bought gifts.
counterfactual: Nobody turned up.
original_ending: Pam bought a cake. Everyone danced and had fun! Pam was a good hostess.
edited_ending: Pam bought a cake.Nobody danced and had fun!Pam was a good hostess.<SEP>Pam bought a cake.She couldn't dance or have fun.Pam was a devastated hostess.<SEP>Pam bought a cake.Everyone would have danced and had fun!Pam would have been a good hostess.