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. LARSON  )   POALES x  ontario 34Nz  schkuhr ex willd. < c`    ESSEX D $  canada (       Cyperaceae  m kW     *+2 map 40 j/2 498558  < 1992-05-07     p   bl2531   ) J  GOSFIELD S. TWP, 2ND CONCESSION. 
{"catalogNumber": "", "order": "Poales", "family": "Cyperaceae", "scientificName": "", "scientificNameAuthorship": "Schkuhr ex Willd.", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "B. Larson", "recordNumber": "BL2531", "verbatimEventDate": "1992-05-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Ontario", "county": "Essex", "municipality": "", "locality": "Gosfield S. Twp, 2nd Concession.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "Map 40 J/2 498558", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}