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": ""}
 Van Buren lW6x  1496834 t   ~3~_ ANTON A. REZNICEK in ca. 12 in. of stamdin_g water, with a +- sandy and slightly mucky bottom, ca. 10 ft. fromshore, in small bay. lake dominatedby nymphaea odorata. cephalanthus occidentais sprouts, nuphar variAegata, pontederia cor~data.       42.100537 #=j0v  PO4LES d,      Z:  540 russell g. schipper q?      l SPARGANIUM  UNITED STATES A2 F      EMERSUM y   
{"catalogNumber": "1496834", "order": "Poales", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Sparganium", "subgenus": "", "specificEpithet": "emersum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Anton A. Reznicek", "recordedBy": "Russell G. Schipper", "recordNumber": "540", "verbatimEventDate": "", "habitat": "In ca. 12 in. of standing water, with a +- sandy and slightly mucky bottom, ca. 10 ft. from shore, in small bay. Lake dominated by Nymphaea odorata. Cephalanthus occidentalis sprouts, Nuphar variegata, Pontederia cordata.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Van Buren", "municipality": "", "locality": "", "decimalLatitude": "42.100537", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}