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": ""}
   Nb k 1971-09-16 ARISTIDA PURPURASCENS eeL    r louisiana ROADBANK OF LA. 34, 2 MILES SOUTH OF EROS. SEC. 23, T16N, R1W. B  R. Dale Thomas AV O               UMITED STATES Aristida cF`          , c@ Poales
{"catalogNumber": "", "order": "Poales", "family": "", "scientificName": "Aristida purpurascens", "scientificNameAuthorship": "", "genus": "Aristida", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "R. Dale Thomas", "recordNumber": "", "verbatimEventDate": "1971-09-16", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Louisiana", "county": "", "municipality": "", "locality": "Roadbank of La. 34, 2 miles south of Eros. Sec. 23, T16N, R1W.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}