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. N  13166H87 E  exigua 6v     xe) salicaceae   cW2 Nutt.  United States _`   Salix exigua /   Charles F. Wheeler L    ionia yRD     DdgF  -84.83763 Salix Z    # 1889-05-15  m MALPIGHIALES  U#7ok 43.09254  HUBBARDSTON. j   Michigan ]awa% 
{"catalogNumber": "1316687", "order": "Malpighiales", "family": "Salicaceae", "scientificName": "Salix exigua", "scientificNameAuthorship": "Nutt.", "genus": "Salix", "subgenus": "", "specificEpithet": "exigua", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Charles F. Wheeler", "recordNumber": "s.n.", "verbatimEventDate": "1889-05-15", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Ionia", "municipality": "", "locality": "Hubbardston.", "decimalLatitude": "43.09254", "decimalLongitude": "-84.83763", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}