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": ""}
JOHN THOMAS HOWELL VEo    7 1431268  MACK. %  CALIFORNIA _, K  Cyperaceae +  54178 wU     0 UOU united states  poales Q     Gw6 LONG VALLEY AT ROAD TO MAXWELL MINE    2` carex        1981-06-23 plumas 0gW   _ gracilior carex gracilior 4T~c 
{"catalogNumber": "1431268", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex gracilior", "scientificNameAuthorship": "Mack.", "genus": "Carex", "subgenus": "", "specificEpithet": "gracilior", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John Thomas Howell", "recordNumber": "54178", "verbatimEventDate": "1981-06-23", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "California", "county": "Plumas", "municipality": "", "locality": "Long Valley at road to Maxwell Mine", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}