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": ""}
      xAM durham       CARL J. ROTHFELS Z6  1459924 y@DB      NIGROMARGINATA 23b;    -78.96087 N8+    cyperaceae 2o6;  Schwein. +T &   CAREX NIGROMARGINATA =3   4O` CAREX
{"catalogNumber": "1459924", "order": "", "family": "Cyperaceae", "scientificName": "Carex nigromarginata", "scientificNameAuthorship": "Schwein.", "genus": "Carex", "subgenus": "", "specificEpithet": "nigromarginata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Carl J. Rothfels", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Durham", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-78.96087", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}