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": ""}
  1543384 xc,l  LINDHEIMERI ^Y.   mQ I 1950-07-25  frequent in open spaces (     IW ESCAMBIA      CROTON LINDHEIMERI S:A     (Engelm. & A. Gray) Engelm. & A. Gray ex Alph. Wood        hd6v G. L. Webster & R. L. Wilbur  MalpighialeKs g rT 
{"catalogNumber": "1543384", "order": "Malpighiales", "family": "", "scientificName": "Croton lindheimeri", "scientificNameAuthorship": "(Engelm. & A. Gray) Engelm. & A. Gray ex Alph. Wood", "genus": "", "subgenus": "", "specificEpithet": "lindheimeri", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "G. L. Webster & R. L. Wilbur", "recordNumber": "", "verbatimEventDate": "1950-07-25", "habitat": "", "occurrenceRemarks": "Frequent in open spaces", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Escambia", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}