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": ""}
   G4  Canada  M>w# perfoliatum  L.  ;wQ   ASTERALES V$5h~   1312535 ?!i   $1x%/ SILPHIUM PERFOLIATUM  1972-09-25 -    simcoe +     Nj< Contact UM Herbarium   vmh 2494  ONTARIO D1?   ?tV? anton a. reznicek   DC silphium   Asteracea3 UDfE 
{"catalogNumber": "1312535", "order": "Asterales", "family": "Asteraceae", "scientificName": "Silphium perfoliatum", "scientificNameAuthorship": "L.", "genus": "Silphium", "subgenus": "", "specificEpithet": "perfoliatum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Anton A. Reznicek", "recordNumber": "2494", "verbatimEventDate": "1972-09-25", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Ontario", "county": "Simcoe", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}