parsing '`'

curl 'http://localhost:9000/?properties={%22annotators%22%3A%22lemma%22%2C%22outputFormat%22%3A%22json%22}' -d '`'

{
  "sentences": [
    {
      "index": 0,
      "tokens": [
        {
          "index": 1,
          "word": "`",
          "originalText": "`",
          "lemma": "`",
          "characterOffsetBegin": 0,
          "characterOffsetEnd": 1,
          "pos": "``",
          "before": "",
          "after": ""
        }
      ]
    }
  ]
}