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": ""}
Asterales 0   rBV& VERNONIA GIGANTEA  bf. trel. ex branner & coville   q$Q S.N.    . Vernonia 1539997 $Y@  Cass eP  north dakota  7<N   mN]9a c.b. waldron   ASTERACEAE 2K)    ve4|5 UNITED STATES   FARGO :dLr      i| GIGANTEA  1890-08-07 %C);S    grpm 2637 *|? 
{"catalogNumber": "1539997", "order": "Asterales", "family": "Asteraceae", "scientificName": "Vernonia gigantea", "scientificNameAuthorship": "Trel. ex Branner & Coville", "genus": "Vernonia", "subgenus": "", "specificEpithet": "gigantea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "C.B. Waldron", "recordNumber": "s.n.", "verbatimEventDate": "1890-08-07", "habitat": "", "occurrenceRemarks": "GRPM 42637", "associatedTaxa": "", "country": "United States", "stateProvince": "North Dakota", "county": "Cass", "municipality": "", "locality": "Fargo", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}