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": ""}
   W 494   ~ canada         EBURNEA   Kel 1369139  1950-06-30  -W<c   McBw  carex eburnea  r~$ newfoundland and labrador   bt Joseph A.E. Rouleau    $w BOOTT  tT 5x POALES CYPERACEAE *TY6f    >Z Carex  
{"catalogNumber": "1369139", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex eburnea", "scientificNameAuthorship": "Boott", "genus": "Carex", "subgenus": "", "specificEpithet": "eburnea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Joseph A.E. Rouleau", "recordNumber": "494", "verbatimEventDate": "1950-06-30", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Newfoundland and Labrador", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}