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": ""}
[active barcode. on same sheet as potamogeton epihydrus with inactive barcode 1259520.] ^64 g   potamogeton B#OQq      1259521 G      *c5I 1919-08-25       ~H upper reaches of slate river [s. of lake gogebic]   VW POTAMOGETONACEAE    henry t. darlington 5-x   0(Ss UNITED STATES  
{"catalogNumber": "1259521", "order": "", "family": "Potamogetonaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Potamogeton", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Henry T. Darlington", "recordNumber": "", "verbatimEventDate": "1919-08-25", "habitat": "", "occurrenceRemarks": "[Active barcode. On same sheet as Potamogeton epihydrus with inactive barcode 1259520.]", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Upper reaches of Slate River [S. of Lake Gogebic]", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}