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 4   @G4BY wilbur@ h. duncan    GEORGIA r0x  30486 j_   1406154 C&Ef    zUz Arundinaria   ARUNDINARIA GIGANTEA u,/     [S+  clarke gigantea 4   1978-04-10      tU(3 (WALTER) MUHL.  s`L  poaceae    B contact um herbarium
{"catalogNumber": "1406154", "order": "", "family": "Poaceae", "scientificName": "Arundinaria gigantea", "scientificNameAuthorship": "(Walter) Muhl.", "genus": "Arundinaria", "subgenus": "", "specificEpithet": "gigantea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Wilbur H. Duncan", "recordNumber": "30486", "verbatimEventDate": "1978-04-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Georgia", "county": "Clarke", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}