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": ""}
   nervosa x:v        h7M William Wayt Thomas    DEku Rhynchospora    Cur-over hillsides in red clay soil, abundant, Bracts white adove [mP     ] RHYNCHOSPORA NERVOSA SUBSP. NERVOSA  15472 Z=  ROGERS MCVAUGH -q    NERVOSA JG  
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Rhynchospora nervosa subsp. nervosa", "scientificNameAuthorship": "", "genus": "Rhynchospora", "subgenus": "", "specificEpithet": "nervosa", "verbatimTaxonRank": "", "infraspecificEpithet": "nervosa", "identifiedBy": "William Wayt Thomas", "recordedBy": "Rogers McVaugh", "recordNumber": "15472", "verbatimEventDate": "", "habitat": "Cur-over hillsides in red clay soil, abundant, Bracts white adove", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}