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": ""}
    + 1873  ,Ik u ASTERACEAE    uR>s cirsium 459 5  JOHN WOLFE |k@b   1441890 24  (A.GAAY) D.J.KEIL  Pt/      2 73 AMERICAN UM  ) Kl ` clavatum UNITED STATES eRze     asterales =i    
{"catalogNumber": "1441890", "order": "Asterales", "family": "Asteraceae", "scientificName": "", "scientificNameAuthorship": "(A.Gray) D.J.Keil", "genus": "Cirsium", "subgenus": "", "specificEpithet": "clavatum", "verbatimTaxonRank": "", "infraspecificEpithet": "americanum", "identifiedBy": "", "recordedBy": "John Wolfe", "recordNumber": "459", "verbatimEventDate": "1873", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}