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": ""}
(Walter) Britton, Sterns & Poggenb. VW       S.N. _@ Zm       hyemalis <WJ   Unit3d States :z    43.2588 0Uy    t >ex EAST DORSET -73.0515 L    S9 1403613   31 a 1857-07-21     -x^ Poaceae 
{"catalogNumber": "1403613", "order": "", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "(Walter) Britton, Sterns & Poggenb.", "genus": "", "subgenus": "", "specificEpithet": "hyemalis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "s.n.", "verbatimEventDate": "1857-07-21", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "East Dorset", "decimalLatitude": "43.2588", "decimalLongitude": "-73.0515", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}