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": ""}
pusillus Z     = subsp. United States >x       CONTACT UM HERBAR IUM  LRr  Potamogeton pusillus subsp. tenuissimus +lMI   vfH5V MASSACHUSETTS    xW William R. Taylor  v 1441268     [~#ga POTAMOGETONACEAE  XFp botamogeton    7 ,^1 s.n. (Mert. & W. D. J. Koch) R. R. Haynes & Hellq. :]$V:  Alismatales Ev!    5 E% tenuissimus
{"catalogNumber": "1441268", "order": "Alismatales", "family": "Potamogetonaceae", "scientificName": "Potamogeton pusillus subsp. tenuissimus", "scientificNameAuthorship": "(Mert. & W. D. J. Koch) R. R. Haynes & Hellq.", "genus": "Potamogeton", "subgenus": "", "specificEpithet": "pusillus", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "tenuissimus", "identifiedBy": "", "recordedBy": "William R. Taylor", "recordNumber": "s.n.", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Massachusetts", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}