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": ""}
   M= Caryophyllales    y CactaceEae Clark ARc    SY H. A. GLEASON       CESPITOSA &  )M  in shale chips on sunny bank      e q Opuntia 1644290 A    1939-08-31 _      
{"catalogNumber": "1644290", "order": "Caryophyllales", "family": "Cactaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Opuntia", "subgenus": "", "specificEpithet": "cespitosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "H. A. Gleason", "recordNumber": "", "verbatimEventDate": "1939-08-31", "habitat": "In shale chips on sunny bank", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Clark", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}