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": ""}
    5mr ASTERACEAE  VAR. @~E[      integrifolium  SILPHIUM INTEGRIFOLIUM VAR. INTEGRIFOLIUM Z    s.n. f      ckAj COPSES, ROADSIDES, AND WASTE GROUND 1892-07-24 (*    a846 1539485  TH5 G)RPM 42212   chicago &   sG ;X united states  t1n R integrnifolium  s Illinos  @3[ silphium
{"catalogNumber": "1539485", "order": "", "family": "Asteraceae", "scientificName": "Silphium integrifolium var. integrifolium", "scientificNameAuthorship": "", "genus": "Silphium", "subgenus": "", "specificEpithet": "integrifolium", "verbatimTaxonRank": "var.", "infraspecificEpithet": "integrifolium", "identifiedBy": "", "recordedBy": "", "recordNumber": "s.n.", "verbatimEventDate": "1892-07-24", "habitat": "Copses, roadsides, and waste ground", "occurrenceRemarks": "GRPM 42212", "associatedTaxa": "", "country": "United States", "stateProvince": "Illinois", "county": "", "municipality": "", "locality": "Chicago", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}