Why My Photos Were Rejected?

Hi,

I uploaded my photos of Istanbul Airport corridors. There were no logos, no people (not recognizable people, just no people around) or anything else that I think maybe a refusal reason. But Adobe Stock has rejected them with the "Intellectual Property Refusal" message. Is Istanbul Airport building is a copyrighted object? Or is it because it is a modern architecture, that requires release? (Adobe Stock mentioned it as "Modern architecture with unique building structures requires a release when it's the main focus of the image.")

The photos were accepted on some other stock agencies that I also submit, and if it were rejected, it was rejected because of noises or film grains (Shutterstock for example).

I hope for some useful answers, so I should aware when I upload other photos in the future.

Thanks.