Translation:The structure of the event is different.
It's hard to listen to sentences that make absolutely no sense. Makes you listen to every single word, because you can't guess it from the context. "The structure of the even is different?" What the heck does that mean?
I would also like an answer to this question. I don't understand how this sentence would be used. I interpreted it as "schedule" as in "schedule of events". But Duolingo says that's not right. If that isn't right, then what's the use and context of this sentence?