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": ""}
   J n "VOUCHER SPEICMEN FOR M.S. THESIS."  F 41.961849  :E SMALL SHRUB IN WET PRAIRIE.    ! `&+ VAIR.   !C(. united states BETULA PUMILA VAR. PUMILA UL~y   PUMILA k   ^Y(ua pumila betula +B)     X Betulaceae  L. l  KATHLEEN A. KRON  >  berrienY D~   kU 617   u*4KY michigan  
{"catalogNumber": "", "order": "", "family": "Betulaceae", "scientificName": "Betula pumila var. pumila", "scientificNameAuthorship": "L.", "genus": "Betula", "subgenus": "", "specificEpithet": "pumila", "verbatimTaxonRank": "var.", "infraspecificEpithet": "pumila", "identifiedBy": "", "recordedBy": "Kathleen A. Kron", "recordNumber": "617", "verbatimEventDate": "", "habitat": "Small shrub in wet prairie.", "occurrenceRemarks": "\"Voucher speicmen for M.S. Thesis.\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Berrien", "municipality": "", "locality": "", "decimalLatitude": "41.961849", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}