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": ""}
nigra @3   ,68 united states      2L Cyperaceae MASSACHUSETTS ?   -71.1214 V34R  42.3316 Qx       R 1902-06-17   ~z=  POALES  _ I carex nigra   ;9/ 1380326 Fayette F. Forbes F `    BROOKLINE. I%  
{"catalogNumber": "1380326", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex nigra", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Fayette F. Forbes", "recordNumber": "", "verbatimEventDate": "1902-06-17", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Massachusetts", "county": "", "municipality": "", "locality": "Brookline.", "decimalLatitude": "42.3316", "decimalLongitude": "-71.1214", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}