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": ""}
          Carex nigromarginata Mwd,   d]t n 1986-04-15     ARKANSAS ,7   CYPERAkCEAE WbTLK    ?`q Polk 1480 3 LaK     i/p~H OUACHITA NAT FOREST, ALONG FSR 38 BETWEEN SHADY LAKE & BARD SPRINGS REC AREA, 1.0 MI N OF ENTRANCE TO SHADY LAKE, AT JCT WITH FSR 508.   k JEFF H. RETTIG  
{"catalogNumber": "", "order": "", "family": "Cyperaceae", "scientificName": "Carex nigromarginata", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Jeff H. Rettig", "recordNumber": "1480", "verbatimEventDate": "1986-04-15", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Arkansas", "county": "Polk", "municipality": "", "locality": "Ouachita Nat Forest, along FSR 38 between Shady Lake & Bard Springs Rec Area, 1.0 mi N of entrance to Shady Lake, at jct with FSR 508.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}