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": ""}
  .  B Ontario m. j. oldham & w. d. bakowsky zrbr       opuntia fragilis a7~  Kenora o  2001-08-14 &   ,OP4g 1644015   THkIZ FRAGILIS  g_1nf 49.5112, -94.44841766     Caryophyllales AX6Ws  OPUNTIA B:m      8. lake of the woods, bath island, south shore  
{"catalogNumber": "1644015", "order": "Caryophyllales", "family": "", "scientificName": "Opuntia fragilis", "scientificNameAuthorship": "", "genus": "Opuntia", "subgenus": "", "specificEpithet": "fragilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "M. J. Oldham & W. D. Bakowsky", "recordNumber": "", "verbatimEventDate": "2001-08-14", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Ontario", "county": "Kenora", "municipality": "", "locality": "Lake of the Woods, Bath Island, south shore", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "49.5112, -94.44841766", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}