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 1915-07-24 Kenneth K. Mackenzie yhS    !:( united states     eleocharis microcarpa var. filiculmi5  &       POALES &(   ^B Ne Jersey    j 8j 1558540   microcarpa lG X  TORR. x   Cyperaceae mA  
{"catalogNumber": "1558540", "order": "Poales", "family": "Cyperaceae", "scientificName": "Eleocharis microcarpa var. filiculmis", "scientificNameAuthorship": "Torr.", "genus": "", "subgenus": "", "specificEpithet": "microcarpa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Kenneth K. Mackenzie", "recordNumber": "", "verbatimEventDate": "1915-07-24", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "New Jersey", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}