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": ""}
  21Rf? CROTON  !m O eula whitehouse  POTTSII B8c!   1 TEXAS  4Y;n5 perennial; foliage silvery-green 1543558 Mih7  CULERSON 6 IB  P. E. Berry q     4 ROCKY FLATS 16918 a  Euphorbiaceae  V     mB> e UNITED STATES  nX  1946-09-20  3 mile south of New Mexico line on Highway 62 eL3     Croton pottsii var. pottsii MiN  VAR. dH   ,!j MALPIGHIALES pottsii #_Y<_ 
{"catalogNumber": "1543558", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "Croton pottsii var. pottsii", "scientificNameAuthorship": "", "genus": "Croton", "subgenus": "", "specificEpithet": "pottsii", "verbatimTaxonRank": "var.", "infraspecificEpithet": "pottsii", "identifiedBy": "P. E. Berry", "recordedBy": "Eula Whitehouse", "recordNumber": "16918", "verbatimEventDate": "1946-09-20", "habitat": "rocky flats", "occurrenceRemarks": "Perennial; foliage silvery-green", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "Culberson", "municipality": "", "locality": "3 miles south of New Mexico line on Highway 62", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}