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": ""}
 U4B  1662556    canada 6c    0gA, 1979-09-20      Squires Ridge to Little Creek Ridges, 12Â½ to 14 Â½ miles from base of point. Along Cedar Creek Ridge near south beach qV?      k WOLFFIA COLUMBIANA  4$ , columbiana  with lemna minor, on surface of shallow water in cepalanthus occidentalis marsh    ontario  gcr,   floa7ing, frequent F  Alismatales z   T o5 5279   ^D~[2 a. a. reznicek 
{"catalogNumber": "1662556", "order": "Alismatales", "family": "", "scientificName": "Wolffia columbiana", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "columbiana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "A. A. Reznicek", "recordNumber": "5279", "verbatimEventDate": "1979-09-20", "habitat": "with Lemna minor, on surface of shallow water in Cepalanthus Occidentalis marsh", "occurrenceRemarks": "floating, frequent", "associatedTaxa": "", "country": "Canada", "stateProvince": "Ontario", "county": "", "municipality": "", "locality": "Squires Ridge to Little Creek Ridges, 12\u00c2\u00bd to 14 \u00c2\u00bd miles from base of point. Along Cedar Creek Ridge near south beach", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}