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. 1544732 8bkJ  salicaceae y=Cg     D 7 Missouri ON SHEET WITH INACTIVE BARCODE 1544733 la~      L MALPIGHIALES Maddenville @kK   mRJJQ caroliniana   h`o Michx. St. Louis       united states   H_      N.M. GLATFELTER 4=OA  1897-05-22 $^   Salix 5WP>  
{"catalogNumber": "1544732", "order": "Malpighiales", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "Salix", "subgenus": "", "specificEpithet": "caroliniana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "N.M. Glatfelter", "recordNumber": "s.n.", "verbatimEventDate": "1897-05-22", "habitat": "", "occurrenceRemarks": "On sheet with inactive barcode 1544733", "associatedTaxa": "", "country": "United States", "stateProvince": "Missouri", "county": "St. Louis", "municipality": "", "locality": "Maddenville", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}