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": ""}
  @ 2006-09-18   SALTON STALL, P. M. PETERSON & SORENG ;    _wb& PHRAGMITES  ?b   beverly s. w.alters  M%d)* phragmites australis subsp. americanus  hX 43.6545 americanus (R  952 :   *b,b ANTON A. REZNICEK       [% subsp.    k!1 1247531  -85.9201 a`Qt5    
{"catalogNumber": "1247531", "order": "", "family": "", "scientificName": "Phragmites australis subsp. americanus", "scientificNameAuthorship": "Saltonstall, P. M. Peterson & Soreng", "genus": "Phragmites", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "americanus", "identifiedBy": "Anton A. Reznicek", "recordedBy": "Beverly S. Walters", "recordNumber": "952", "verbatimEventDate": "2006-09-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "43.6545", "decimalLongitude": "-85.9201", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}