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": ""}
   B RETROFLEXA  ~@3i MISSISIPBI       CHARLES T. BRYSON  fm0  Carex retroflexa z mBH      (P 2.6 mi sse of attala-carroll co line along ms hwy 35 at roadside p4rk, n of carmack community.   UNITED STATES OPK   1986-04-12 @b;    MUHL. EX WILLD.  bj   auwg 4135  1384842 !9j.  
{"catalogNumber": "1384842", "order": "", "family": "", "scientificName": "Carex retroflexa", "scientificNameAuthorship": "Muhl. ex Willd.", "genus": "", "subgenus": "", "specificEpithet": "retroflexa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Charles T. Bryson", "recordNumber": "4135", "verbatimEventDate": "1986-04-12", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Mississippi", "county": "", "municipality": "", "locality": "2.6 mi SSE of Attala-Carroll Co line along MS Hwy 35 at roadside park, N of Carmack community.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}