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": ""}
     1557730   2@%  west gulf coastal plain/mississippi alluvial plain boundary. byrd lake natural area. powerline r-o-w s of 52nd ave.     * Carex arkansana   5^ arkansana  N 34.17759, W 91.99452 Q         Jefferson d    DI CARdEX   ,8GAG Theo Witsell Poales e   uniteo states    
{"catalogNumber": "1557730", "order": "Poales", "family": "", "scientificName": "Carex arkansana", "scientificNameAuthorship": "", "genus": "Carex", "subgenus": "", "specificEpithet": "arkansana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Theo Witsell", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Jefferson", "municipality": "", "locality": "West Gulf Coastal Plain/Mississippi Alluvial Plain boundary. Byrd Lake natural Area. Powerline r-o-w S of 52nd Ave.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "N 34.17759, W 91.99452", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}