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": ""}
 POLK D   1931-09-02 tr[  Caryophyllales x Ws    P< j  OPUNTIA MESACANTHASUBSP. LATA  6620 Ce g&   1644135 +      Opuntia 5J6^  (SMALL) MAJURE 4x.5E  FLORID4 Z  NEAR LAKE ALFRED B*aa    1A+&  subsp.   mesacantha R +H  Small hammock $ $     f3 JAMES B. MCFARLIN
{"catalogNumber": "1644135", "order": "Caryophyllales", "family": "", "scientificName": "Opuntia mesacantha subsp. lata", "scientificNameAuthorship": "(Small) Majure", "genus": "Opuntia", "subgenus": "", "specificEpithet": "mesacantha", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "James B. McFarlin", "recordNumber": "6620", "verbatimEventDate": "1931-09-02", "habitat": "Small hammock", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Florida", "county": "Polk", "municipality": "", "locality": "near Lake Alfred", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}