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": ""}
1392643 NB,   A:z, Poales  virescens 4q  H   K,A f. raymond fosberg     wVn UNITED STATES           x 1964-06-06 virginia  ^c      7 muhl. ex willd. 45460 m  Carex virescens K <i   QKq Cyperaceae 
{"catalogNumber": "1392643", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex virescens", "scientificNameAuthorship": "Muhl. ex Willd.", "genus": "", "subgenus": "", "specificEpithet": "virescens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "F. Raymond Fosberg", "recordNumber": "45460", "verbatimEventDate": "1964-06-06", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Virginia", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}