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": ""}
Cuyperaceae @Z   B Eleocharis tuberculosa  =6k@ 1909-09-18      Anonymous Pl. OExs. Grayan. 139 (   lto POALES  UNITED STATES j  tuberculosa M  ELEOCHARIS Fg.      (Michx.) Roem. & Schult. u4    MASSACHUSETTS I4 ay   1398750 9v&     (d merritt l. fernald  l MARGIN OF ROUND POND, TEWKSBURY.
{"catalogNumber": "1398750", "order": "Poales", "family": "Cyperaceae", "scientificName": "Eleocharis tuberculosa", "scientificNameAuthorship": "(Michx.) Roem. & Schult.", "genus": "Eleocharis", "subgenus": "", "specificEpithet": "tuberculosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Merritt L. Fernald", "recordNumber": "Anonymous Pl. Exs. Grayan. 139", "verbatimEventDate": "1909-09-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Massachusetts", "county": "", "municipality": "", "locality": "Margin of Round Pond, Tewksbury.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}