How does ground rent show up in purchase data?

[Season Price]

Hi, everyone. I am an investor in the Maryland/DC/Virginia area. I have a request for Baltimore properties. I have stayed away from Baltimore in the past because of ground rent and some other things. So, my question is how does ground rent show up on the sdat information for a purchase? I am seeing some delinquencies that show foreclosure, but the numbers don't make sense unless there is some sort of ground rent or non-mortgage loan tied up with the properties. Any help is appreciated. Thank you.