(Salem, OR)  --  Marion County deputies are looking for an elderly Salem woman with dementia who's reported to be missing.  Authorities say 89-year-old Sybil Gordon hasn't been seen since leaving her Fisher Road Northeast home to go shopping around 3:30 yesterday afternoon.  Family members reported her missing at 8:15 last night.  The sheriff's office says Sybil Gordon was driving a silver, 2005 Kia Rio with Oregon license plate 327FNT.