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": ""}
  7:~ (Benth.) Drn   -w Malpighiales   a SALIX EXIGUA VAR. HINDSIANA     exigua H( F    f hindsiana      1455517     9+(O CALIFORNIA   D :G Salix   :oq uni7ed states  X Salicaceae  var. k m   
{"catalogNumber": "1455517", "order": "Malpighiales", "family": "Salicaceae", "scientificName": "Salix exigua var. hindsiana", "scientificNameAuthorship": "(Benth.) Dorn", "genus": "Salix", "subgenus": "", "specificEpithet": "exigua", "verbatimTaxonRank": "var.", "infraspecificEpithet": "hindsiana", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "California", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}