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": ""}
NIGRA 8@8 T     ? Robert W. Smith united states BJ|  MICHIGAN f       Aiton   1468134 oZh$    6 o Prunus nigr~a   ~M 41.88366 PRUNUS o    Rosaceae s   ` -83.972971  46 LQ Top edge of wooded bluff.  ! 2413   4XU%> 1988-04-24 W. OF RIVER RAISIN, S. OF PALMYRA RD., PALMYRA TWP. T 
{"catalogNumber": "1468134", "order": "", "family": "Rosaceae", "scientificName": "Prunus nigra", "scientificNameAuthorship": "Aiton", "genus": "Prunus", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Robert W. Smith", "recordNumber": "2413", "verbatimEventDate": "1988-04-24", "habitat": "Top edge of wooded bluff.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "W. of River Raisin, S. of Palmyra Rd., Palmyra Twp.", "decimalLatitude": "41.88366", "decimalLongitude": "-83.972971", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}