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": ""}
 u, united states   solanum ptychanthum kW]   ptychanthum S     f 1593  Cheboygan :      P| 45.56668  cutover hardwoods, -      john h. ehlers 1w,Eu     R:D2 1921-07-15 SOLANUM gD  dunal P 
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Solanum ptychanthum", "scientificNameAuthorship": "Dunal", "genus": "Solanum", "subgenus": "", "specificEpithet": "ptychanthum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John H. Ehlers", "recordNumber": "1593", "verbatimEventDate": "1921-07-15", "habitat": "Cutover Hardwoods,", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Cheboygan", "municipality": "", "locality": "", "decimalLatitude": "45.56668", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}