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": ""}
    ; nigromarginata 2843 U   g&aD[ SCOTT     ?~8_s Ouachita National Forest, approximatey 5.5 mi S, 1.5 mi E junction of Hwy 80 & Business Loop Hwy 71 in Waldron, 4.7 mi E junctVion of Hwy 71 & County Road 30 (FSR 892), above Buffalo Creek.   <;S arkansas  k  CAREX NIGROMARGINATA   carex yaLu   Cyperaceae S      CALEB A. MORSE ua6     
{"catalogNumber": "", "order": "", "family": "Cyperaceae", "scientificName": "Carex nigromarginata", "scientificNameAuthorship": "", "genus": "Carex", "subgenus": "", "specificEpithet": "nigromarginata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Caleb A. Morse", "recordNumber": "2843", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Arkansas", "county": "Scott", "municipality": "", "locality": "Ouachita National Forest, approximately 5.5 mi S, 1.5 mi E junction of Hwy 80 & Business Loop Hwy 71 in Waldron, 4.7 mi E junction of Hwy 71 & County Road 30 (FSR 892), above Buffalo Creek.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}