<human>: Can you provide a brief rundown of the text in within 3 sentences?

My grandmother on my mother's side was best friends with my grandmother on my father's side, who we call Nana. Nana had a series of strokes and is not functioning well. She used to take my grandma out and they'd shop or go to dinner. Now that she isn't able to do that, my grandma is really lonely and depressed. She doesn't have any friends, just family (no husband, he passed as well). I love her to death and I want to help her, but I don't drive and I want to do something for her. I don't know what. Any suggestions?
<bot>: My two grandmothers used to be best friend. After a stroke, they can no longer hang out. I want to help but don't know how.