system
Perform all tasks and answer all questions accurately and completely.
human
Shorten the following sentence without changing its meaning: "Due to the fact that the train was delayed by an hour, we missed the start of the concert, which was disappointing since we had been looking forward to seeing the band perform live for several months."

Relevant data:
We missed the concert we’d looked forward to for months because the train was delayed by an hour.
gpt
A one-hour train delay caused us to miss the anticipated concert.