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": ""}
     m6! 1519862 DUBIA  B    B.E. LIVINGSTON (     DUBIA @wx  GRPM s.n. L FbW  NEW JERSEY OZ[n      $ var.  z 1894-07-25   B Mil.burn [Millburn]  @ United States     3u  LINDERNIACEAE
{"catalogNumber": "1519862", "order": "", "family": "Linderniaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "dubia", "verbatimTaxonRank": "var.", "infraspecificEpithet": "dubia", "identifiedBy": "", "recordedBy": "B.E. Livingston", "recordNumber": "", "verbatimEventDate": "1894-07-25", "habitat": "", "occurrenceRemarks": "GRPM s.n.", "associatedTaxa": "", "country": "United States", "stateProvince": "New Jersey", "county": "", "municipality": "", "locality": "Milburn [Millburn]", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}