The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;
Ernest LANGE, 1895 - interred 8 Jan 1987
Martha LANGE, 1910 - no date
both names next to each other in the Mount Pleasant cemetery, South Edmonton.
For further research please contact the Research Committee of the Edmonton Branch.
http://abgensoc.ca/Peter