The play is a dramatic representation of a real event.

这出话剧改编自真人真事.

Regardless of the author, it seems that the poem was inspired by a real event.

不管作者是谁，这首诗似乎是受到了一件真实事件的启发。

Maybe, or maybe the real event triggered a recollection of a dream, which not seems like it must have been in your thoughts all along.

也许吧，或许是真实事件让你回忆起某个梦境，而这个梦境不一定一直都在你的脑海中。