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": ""}
   OV  Prunus nigra Prunus [    MKk> John H. Ehlers  k R  Rosaceae  vG >y rosales   @ AitoLn   &%t5z MICHIGAN  #6  NIGRA   United States /rj  Hardwoods. BOi       2    burt lake. colonial point. CHEBOYGAN =[   1921-08-08 g   b] 45.47969 -84.6807 F    R2 1752
{"catalogNumber": "", "order": "Rosales", "family": "Rosaceae", "scientificName": "Prunus nigra", "scientificNameAuthorship": "Aiton", "genus": "Prunus", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John H. Ehlers", "recordNumber": "1752", "verbatimEventDate": "1921-08-08", "habitat": "Hardwoods.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Cheboygan", "municipality": "", "locality": "Burt Lake. Colonial Point.", "decimalLatitude": "45.47969", "decimalLongitude": "-84.6807", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}