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": ""}
natans <s   GLADWIN ~e!        z POTAMOGETONACEAE  d&iU; Alismatales     920  +UC  -84.56942  Wm^6     s potamogeton natans  t~P| United States   a J? l.   ![>7I p.h. eschmeyer 1938-08-26 l?Jhh   
{"catalogNumber": "", "order": "Alismatales", "family": "Potamogetonaceae", "scientificName": "Potamogeton natans", "scientificNameAuthorship": "L.", "genus": "", "subgenus": "", "specificEpithet": "natans", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "P.H. Eschmeyer", "recordNumber": "920", "verbatimEventDate": "1938-08-26", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Gladwin", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-84.566942", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}