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": ""}
S.N. 3k      H. M. Willmarth <4 o    6e&Lc 1883-06-16   Opuntia Om.|0   (Raf.) Raf. +m   W  CP HUMIFUSA    PEMBERTON =      1644016 DGI      s0S@g OPUNTIA HUMIFUSA
{"catalogNumber": "1644016", "order": "", "family": "", "scientificName": "Opuntia humifusa", "scientificNameAuthorship": "(Raf.) Raf.", "genus": "Opuntia", "subgenus": "", "specificEpithet": "humifusa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "H. M. Willmarth", "recordNumber": "s.n.", "verbatimEventDate": "1883-06-16", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Pemberton", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}