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": ""}
united states r  carex nigricans U    Bk1 38950  6&&0w Siskiyou  Mt. Shasta National Forest, S slope of Mt. Shasta, Panther Creek Meadows. 9    C5Q(  1380446  k+z| 1969-08-10  <  X Poales          CAREX Ri     nigricans O,_    
{"catalogNumber": "1380446", "order": "Poales", "family": "", "scientificName": "Carex nigricans", "scientificNameAuthorship": "", "genus": "Carex", "subgenus": "", "specificEpithet": "nigricans", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "38950", "verbatimEventDate": "1969-08-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Siskiyou", "municipality": "", "locality": "Mt. Shasta National Forest, S slope of Mt. Shasta, Panther Creek Meadows.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}