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": ""}
KENT t=r   F5 engelm. & bigelow    tortispina 2    )kj  opuntia tortispina  QvE6) 1981-11-13  G cactaceae        a. a. reznicek p*       3Gr Canada  6647 h;d   ontario 1d>5(    d 1644027 SO<UTH FACING SLOPE OF SMALL, DRY, OPEN SAND RIDGE CA 20 FT HIGH 47f 
{"catalogNumber": "1644027", "order": "", "family": "Cactaceae", "scientificName": "Opuntia tortispina", "scientificNameAuthorship": "Engelm. & Bigelow", "genus": "", "subgenus": "", "specificEpithet": "tortispina", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "A. A. Reznicek", "recordNumber": "6647", "verbatimEventDate": "1981-11-13", "habitat": "South facing slope of small, dry, open sand ridge ca 20 ft high", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Ontario", "county": "Kent", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}