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": ""}
 30 M@H_   [`r@ CAREX DENSA         Banks of Wyandotte Creek, 1/8 mile south of Central House Road, east of the Western Pacific Railroad, about 1 1/2 miles north & 1 mile west of  Honcut, about 12 miles south of Oroville. =RB j    Lowell Ahart [%<?z   1987-05-10 ):     b POALES     8:U california V*A!B butt  
{"catalogNumber": "", "order": "Poales", "family": "", "scientificName": "Carex densa", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Lowell Ahart", "recordNumber": "", "verbatimEventDate": "1987-05-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "California", "county": "Butte", "municipality": "", "locality": "Banks of Wyandotte Creek, 1/8 mile south of Central House Road, east of the Western Pacific Railroad, about 1 1/2 miles north & 1 mile west of Honcut, about 12 miles south of Oroville.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "30", "maximumElevationInMeters": ""}