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": ""}
   rhynchospora zb   Rhynchospora caduca ?4     H POALES     lexington aPv  1399462 hY U    cyperac=eae EdD =    h elliot   XS  1996-06-27  near terminus of garden lane just north of boat landing at sharp bend in road, n side of saluda river, irmo 7.5' topo. b@i9+    united states  f   
{"catalogNumber": "1399462", "order": "Poales", "family": "Cyperaceae", "scientificName": "Rhynchospora caduca", "scientificNameAuthorship": "Elliot", "genus": "Rhynchospora", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1996-06-27", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Lexington", "municipality": "", "locality": "Near terminus of Garden Lane just north of boat landing at sharp bend in road, N side of Saluda River, Irmo 7.5' topo.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}