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": ""}
  leptocaulis U     cylindrpopuntia lyeptocaulis   Brewster   GT  723 8e v`   u l. benson  Margery S. Anthony Zxwn     1644209 Z39  ARYOPHYLLALES 1        8 I= United States        
{"catalogNumber": "1644209", "order": "Caryophyllales", "family": "", "scientificName": "Cylindropuntia leptocaulis", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "leptocaulis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "L. Benson", "recordedBy": "Margery S. Anthony", "recordNumber": "723", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Brewster", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}