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": ""}
 []` frequent  Ef S.D. & G.D. Jones       6523    BREWSTER . yp     oMzlQ texas    1991-04-19 zD 9  BIG BEND (NP); TRAIL TO BOOT SPRINGS, CA. 300 M ABOVE THE LODGE. GK6          
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "S.D. & G.D. Jones", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "6523", "verbatimEventDate": "1991-04-19", "habitat": "", "occurrenceRemarks": "Frequent", "associatedTaxa": "", "country": "", "stateProvince": "Texas", "county": "Brewster", "municipality": "", "locality": "Big Bend (NP); trail to Boot Springs, ca. 300 m above the lodge.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}