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": ""}
1994-05-30 ?:x   y7 Cypeaceae   52~h4Y britton     ~X ANTON A. REZNICEK    ` 9840   : United States  POALES  p   BICKNELLII Q~ h     `M  missouri trs: t57n r26w sec 21 se 1/4 b   carex bicknellii $,       caldwell /H 
{"catalogNumber": "", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex bicknellii", "scientificNameAuthorship": "Britton", "genus": "", "subgenus": "", "specificEpithet": "bicknellii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Anton A. Reznicek", "recordNumber": "9840", "verbatimEventDate": "1994-05-30", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Missouri", "county": "Caldwell", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "TRS: T57N R26W sec 21 SE 1/4", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}