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": ""}
  g. w. letterman ,k   (willd.) b.w. van ee & p.e. berry t    p. e. berry $   NEAR ALLENTON  f;0  1543446 gH274    xI<8F Croton elliptica =RH>Z     m_2P Euphorbiaceae NO DATA Q3p  MISSOURI  D    4 michauxii  MALPGHIALES qCmO   s.n. ]   eu, 1880-07  =W) var. 
{"catalogNumber": "1543446", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "", "scientificNameAuthorship": "(Willd.) B.W. van Ee & P.E. Berry", "genus": "Croton", "subgenus": "", "specificEpithet": "michauxii", "verbatimTaxonRank": "var.", "infraspecificEpithet": "elliptica", "identifiedBy": "P. E. Berry", "recordedBy": "G. W. Letterman", "recordNumber": "s.n.", "verbatimEventDate": "1880-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Missouri", "county": "no data", "municipality": "", "locality": "near allenton", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}