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": ""}
    -s7 potamogeton Potamogetonaceae #T       (j.w. robbins^) haynes & c.b. hellquist    Potamogeton pusillus subsp. gemmiparus %    L!a subsp. 1880-07-16 X   9Bpx grpm 41538  BCC river  FRED H. HORSFORD I         
{"catalogNumber": "", "order": "", "family": "Potamogetonaceae", "scientificName": "Potamogeton pusillus subsp. gemmiparus", "scientificNameAuthorship": "(J.W. Robbins) Haynes & C.B. Hellquist", "genus": "Potamogeton", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Fred H. Horsford", "recordNumber": "", "verbatimEventDate": "1880-07-16", "habitat": "River", "occurrenceRemarks": "GRPM 41538", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}