wasser-de-bfg harvester fails to detect proper names for persons.

Currently we have the following resulting Dataset below (harvester/regression-test/datasets/wasser-de-bfg/1607.json) that shows the selector for person names does not work properly.

  "title": "Ansprechpersonen Bereich Wasser MELUND Schleswig-Holstein",
  "description": "Ansprechpersonen für den Bereich Wasser im Ministerium für Energiewende, Landwirtschaft, Umwelt, Natur und Digitalisierung (MELUND) Schleswig-Holstein",
  "origins": [
    "/Bund/BfG/Wasser-DE"
  ],
:
:
:
  "organisations": [
    {
      "name": "Schleswig-Holstein",
      "role": "Publisher"
    }
  ],
  "persons": [
    {
      "name": " , ",
      "role": "Contact",
      "emails": [
        " @ ",
        "hwrl@melund.landsh.de",
        "wrrl@melund.landsh.de"
      ]
    },
    {
      "name": "Völkel, Martina",
      "role": "Contact",
      "emails": [
        "Martina.Voelkel@umwelt.bremen.de"
      ]
    }
  ],