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": ""}
   O Silphium perfoliatum var. perfoliatum  KT United States    ln var. 1539479 zE^    s Asteraceae  ASTERALES  8    y perfoliatum     PERFOLIATUM 7 >`       W.S. MOFFATT k@dB  chicago L z   
{"catalogNumber": "1539479", "order": "Asterales", "family": "Asteraceae", "scientificName": "Silphium perfoliatum var. perfoliatum", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "perfoliatum", "verbatimTaxonRank": "var.", "infraspecificEpithet": "perfoliatum", "identifiedBy": "", "recordedBy": "W.S. Moffatt", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Chicago", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}