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": ""}
1939-05-28 l   1644139 a1R  16874 Pk;a`     Ã OCCIDENTALIS K  Clark LLXQ    abM  caryophyllales ENGELM. & J.M.BIGELOW Cg   OPUNTIA Ã OCCIDENTALIS o     CAZCTACEAE Vj <     M UNITED STATES   8f OPUNTIA   uR|l nevada  c. s. clokey X E     y Charleston Mts
{"catalogNumber": "1644139", "order": "Caryophyllales", "family": "Cactaceae", "scientificName": "Opuntia \u00c3\u0097 occidentalis", "scientificNameAuthorship": "Engelm. & J.M.Bigelow", "genus": "Opuntia", "subgenus": "", "specificEpithet": "\u00c3\u0097 occidentalis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "C. S. Clokey", "recordNumber": "16874", "verbatimEventDate": "1939-05-28", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Nevada", "county": "Clark", "municipality": "", "locality": "Charleston Mts", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}