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": ""}
 .gR Dioscorea villosa 1962-05-21  u(+y       united states Y     L< Michigan     a@ L. -83.653525 mW]@G   1U dioscoreales  6 Dioscorea  wooded sand ridge. CZ       [lBt s.n.  1339520 s/$Y  
{"catalogNumber": "1339520", "order": "Dioscoreales", "family": "", "scientificName": "Dioscorea villosa", "scientificNameAuthorship": "L.", "genus": "Dioscorea", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "s.n.", "verbatimEventDate": "1962-05-21", "habitat": "Wooded sand ridge.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-83.653525", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}