ex used as an epithet

There is at least 1 case where ex is used as an epithet for A. transcaspica ssp. ex Wan, but by mistake.

I think GNParser currently handles the issue well, but as we discussed, I am opening an issue to keep track of ex used as an epithet.

{
  "parsed": true,
  "quality": 3,
  "qualityWarnings": [
    [3,"Abbreviated uninomial word"],
    [3,"Unparsed tail"]
  ],
  "verbatim": " A. transcaspica ssp. ex Wan",
  "normalized": "A. transcaspica",
  "cardinality": 2,
  "canonicalName": {
    "full": "A. transcaspica",
    "simple": "A. transcaspica",
    "stem": "A. transcaspic"
  },
  "details": [
    {
      "genus": {
        "value": "A."
      },
      "specificEpithet": {
        "value": "transcaspica"
      }
    }
  ],
  "positions": [
    ["genus",1,3],
    ["specificEpithet",4,16]
  ],
  "surrogate": false,
  "virus": false,
  "hybrid": false,
  "bacteria": false,
  "unparsedTail": " ssp. ex Wan",
  "nameStringId": "27d86fb5-b858-5c0c-bd1b-0d9a77cff77b",
  "parserVersion": "v0.14.1"
}