I don't know if you ever got an answer on the death of Nannie Robinson, but in case you didn't there is a listing for a Nannie L. Robinsonwho died June 22, 1928 in Summit County. I found this on the Ohio Death Index. The death certificate number is 19. You can e-mail the special collections department of the Akron-Summit County Library and they will send you a copy of the death certificate. You can also ask them to look up the obit for you. You can find the information for the library on the internet. Just do a search for Ohio Public Libraries,after you find it, then choose Summit County, then Akron-Summit County Library.