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": ""}
1543462 X   lR croton miYchauxii var. elliptica EUPHORBIACEAE M8@0`B       G% Tazewell Croton |KmW     (willd.) b.w. van ee & p.e. berry 1<Q#;        !vNu MICHAUXII Sandy bluff above Spring Lake iF      UNITED STATES f    
{"catalogNumber": "1543462", "order": "", "family": "Euphorbiaceae", "scientificName": "Croton michauxii var. elliptica", "scientificNameAuthorship": "(Willd.) B.W. van Ee & P.E. Berry", "genus": "Croton", "subgenus": "", "specificEpithet": "michauxii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Tazewell", "municipality": "", "locality": "Sandy bluff above Spring Lake", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}