Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
    sternb. & hoppe =+   YyC  ronniger     7W<r ovata      (G 1642860   gZ 1899-05  austria  Q        mercurialis < 3a    * NIEDERÃ¶STERREICH + 55 MÃ¶dling
{"catalogNumber": "1642860", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "Sternb. & Hoppe", "genus": "Mercurialis", "subgenus": "", "specificEpithet": "ovata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Ronniger", "recordNumber": "", "verbatimEventDate": "1899-05", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Austria", "stateProvince": "Nieder\u00c3\u00b6sterreich", "county": "M\u00c3\u00b6dling", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}