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": ""}
      s.n. GRA     *>+e 41.8345896 Flood plain. ]+  SALIX  6:A  nigra  A   -86.6231632 6  Carleton R. Ball # Y H     - h. COLLECTED AT WARREN WOODS.   +EC  u|nited states  SALICACEAE = 3 3   GY3 C cecil billington  1318177 ;c*%   1921-05-21 O 
{"catalogNumber": "1318177", "order": "", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Salix", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Carleton R. Ball", "recordedBy": "Cecil Billington", "recordNumber": "s.n.", "verbatimEventDate": "1921-05-21", "habitat": "Flood plain.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Collected at Warren Woods.", "decimalLatitude": "41.8345896", "decimalLongitude": "-86.6231632", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}