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": ""}
 Cass 5ai%   argentea 7&H    &W*= united states  Michigan 7u_B        potentilla +   $6&c Along sandy roadside.  L. sl  BETTY M. ROBERTSON  @8pw   F~tT 417 ROSACEAE b.    9~n 1940-06-12 41.896648 NU  Barbara Ertter & J.L. Reveal 9rD$   -85.796827 c<nwu 
{"catalogNumber": "", "order": "", "family": "Rosaceae", "scientificName": "", "scientificNameAuthorship": "L.", "genus": "Potentilla", "subgenus": "", "specificEpithet": "argentea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Barbara Ertter & J.L. Reveal", "recordedBy": "Betty M. Robertson", "recordNumber": "417", "verbatimEventDate": "1940-06-12", "habitat": "Along sandy roadside.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Cass", "municipality": "", "locality": "", "decimalLatitude": "41.896648", "decimalLongitude": "-85.796827", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}