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": ""}
  ES1 MOENCH    Vermont RNv   united states ( C:c    $ f NIGRUM   m$a? Apocynaceae   no data provided on label of catalog no: 1544936  vw%,       &DK 1544936  |g*n  s.n.  ,bM GEORGE H. LELAND  Wg 1881-08-13 VINCETOXICU NIGRUM k       7WTN Vincetoxicum
{"catalogNumber": "1544936", "order": "", "family": "Apocynaceae", "scientificName": "Vincetoxicum nigrum", "scientificNameAuthorship": "Moench", "genus": "Vincetoxicum", "subgenus": "", "specificEpithet": "nigrum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "George H. Leland", "recordNumber": "s.n.", "verbatimEventDate": "1881-08-13", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Vermont", "county": "", "municipality": "", "locality": "no data provided on label of catalog no: 1544936", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}