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": ""}
  ! 460    x(f, bromus  BX  poales  1308124 +  -84.79956 sQs  united states 4k    1937-08-02 B+c    @ LeRoy H. Harvey L. @!S      BROMUS TECTORUM &:    b pb 45.55878 tectorum  Ux    
{"catalogNumber": "1308124", "order": "Poales", "family": "", "scientificName": "Bromus tectorum", "scientificNameAuthorship": "L.", "genus": "Bromus", "subgenus": "", "specificEpithet": "tectorum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "LeRoy H. Harvey", "recordNumber": "460", "verbatimEventDate": "1937-08-02", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "45.55878", "decimalLongitude": "-84.79956", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}