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": ""}
thurb. Rg_  1949-06-15 DYNbp     DR3 1403059  277 s ;wP     UNITED STATES 2    ACHNATHERUM >  ACHNATHERUM CORONAUM S1IM8+     (P CORONATUM  j .D blackstone ranch, 15 miles south of sheffield. Poales g]       
{"catalogNumber": "1403059", "order": "Poales", "family": "", "scientificName": "Achnatherum coronatum", "scientificNameAuthorship": "Thurb.", "genus": "Achnatherum", "subgenus": "", "specificEpithet": "coronatum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "277", "verbatimEventDate": "1949-06-15", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Blackstone Ranch, 15 miles south of Sheffield.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}