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": ""}
   21L 1426850   pk  Poales  EL/YMOIDES +   h C. Hostein, N. Carlson  a0@V 1939-05-06   e ELYMUS ELYMOIDES      ( N-26     (> (RAF.) SWEZEY  LYON Gb      ELYMUS p!   
{"catalogNumber": "1426850", "order": "Poales", "family": "", "scientificName": "Elymus elymoides", "scientificNameAuthorship": "(Raf.) Swezey", "genus": "Elymus", "subgenus": "", "specificEpithet": "elymoides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "C. Holstein, N. Carlson", "recordNumber": "N-26", "verbatimEventDate": "1939-05-06", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Lyon", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}