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": ""}
  , caryophyllales        Mtq polyacantha   ;DX@ REGION OF THE BLACK HILLS    HAW. CLAUDE A. BARR -  1644450      oz2 CACTACEAE   4 tk    SMITHWICK rj6   Obw%L south dakota  Q 1= opuntia   OPUNTIA POLYACANTHA H  FALL RIVER 2:  
{"catalogNumber": "1644450", "order": "Caryophyllales", "family": "Cactaceae", "scientificName": "Opuntia polyacantha", "scientificNameAuthorship": "Haw.", "genus": "Opuntia", "subgenus": "", "specificEpithet": "polyacantha", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Claude A. Barr", "recordNumber": "4", "verbatimEventDate": "", "habitat": "Region of the Black Hills", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "South Dakota", "county": "Fall River", "municipality": "", "locality": "Smithwick", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}