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": ""}
       1641998 dz3z&  texas S   engelmannii 1R   6<2:b uvalde 18 MI. W. OF UVALDE @-    PZa! 186 Salm-Dyck $-  1948-03-30 t+O*e    CACTACEAE =?I ]  OPUNTIA #    I Uni7ed States on overgrazed range land /6I    0 opuntia engelmannii  
{"catalogNumber": "1641998", "order": "", "family": "Cactaceae", "scientificName": "Opuntia engelmannii", "scientificNameAuthorship": "Salm-Dyck", "genus": "Opuntia", "subgenus": "", "specificEpithet": "engelmannii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "186", "verbatimEventDate": "1948-03-30", "habitat": "on overgrazed range land", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "Uvalde", "municipality": "", "locality": "18 mi. w. of Uvalde", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}