In case it's helpful to your research, there was an Anna Sery (née Schmieder), who died in Aug. 1923 in Milwaukee. Her death notices were published in the local German language newspapers. There are no other Schmieder or Schmider entries listed in "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
For more specific information contact:
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007... helping to access our historic immigrant culture.