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": ""}
   roberta case  YDR     -84.243832 `b2    $vH on hwy 33, w of big rock cormers     ,W75HARVEY E. BALLARD, JR.    1955-04-30 J%    5 UNITED STATES   #Y VIOLA SELKIRKII   eiRWz BURSH EX GOLDIE    
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Viola selkirkii", "scientificNameAuthorship": "Pursh ex Goldie", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Harvey E. Ballard, Jr.", "recordedBy": "Roberta Case", "recordNumber": "", "verbatimEventDate": "1955-04-30", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "on Hwy 33, W of Big Rock Corners", "decimalLatitude": "", "decimalLongitude": "-84.243832", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}