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": ""}
          mi_ z PRUNUS NIGRA    y Old R.R. grade, E. end of N. edge, Wilmot Twp.            dk=H: CHEBOYGAN  5BA ["PRESUMABLY PLANTED" FIDE FIELD NOTES, BUT IS NATIVE IN THIS AREA]  
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Prunus nigra", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "[\"Presumably planted\" fide field notes, but IS native in this area]", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Cheboygan", "municipality": "", "locality": "Old R.R. grade, E. end of N. edge, Wilmot Twp.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}