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": ""}
  1968-04-21 _!6`   tn frederick w. case, jr., roberta b. case, Bdavid case & george l. burrows iv  s.n. ; IM   f2S:9 SAGINAW  Kc RANUNCULALES   i*0 united states     Michigan  thalictrum ioicum a1/$  !+Y# chesaning twp.    ; ranunculaceae  1351287 =Q  -84.115 v;E    L. >w      
{"catalogNumber": "1351287", "order": "Ranunculales", "family": "Ranunculaceae", "scientificName": "Thalictrum dioicum", "scientificNameAuthorship": "L.", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Frederick W. Case, Jr., Roberta B. Case, David Case & George L. Burrows IV", "recordNumber": "s.n.", "verbatimEventDate": "1968-04-21", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Saginaw", "municipality": "", "locality": "Chesaning Twp.", "decimalLatitude": "", "decimalLongitude": "-84.115", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}