mulders in groningen

Hello, we are trying to find the grave of Geert Mulder and Elisabeth Achttien in Zuiderbegraafplaat in Groningen.  It appears a photo (11655) was taken of the grave, and we requested it, but I think it could not be found. 

Sorry for the English.  I do not speak dutch, so if any body can help find a picture or the location of the grave within the cemetery it would be much appreciated.

Thank you!