premise: It was  my final performance in marching band.
initial: I was playing the snare drum in the band.
counterfactual: I forgot my drum for the final performance.
original_ending: We played Thriller and Radar Love. The performance was flawless. I was very proud of my performance.
edited_ending: We played Thriller and Radar Love.The performance was flawless other than the lost drumI was very proud of my performance.<SEP>I borrowed one from the classroom and we played Thriller and Radar Love.The performance was flawless.I was very proud of my performance.<SEP>I played the synth instead.The performance was flawless.I was very proud of my performance.