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": ""}
 1539518 B,3  Asteraceae :Qk?%  DC. r         [Y (Z STEVIA CARACASANA  steep hillsides in pine forest areas, in heavy red clay loam [       19.8935 +A8        -102.97629 ;b-  
{"catalogNumber": "1539518", "order": "", "family": "Asteraceae", "scientificName": "Stevia caracasana", "scientificNameAuthorship": "DC.", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "Steep hillsides in pine forest areas, in heavy red clay loam", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "19.8935", "decimalLongitude": "-102.97629", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}