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": ""}
  :H united states  W&Y_F poa POACEAE 7M:   1939-05-21 E  arkansas ,,.>    Clearings wooded hill a       EmF ROBERT BEBB  Z  Poales   L. r ,    33 SEARCY  NvW 1422190  POA PRATENSIS 1W)    pratensis =7&we   4018 :d 
{"catalogNumber": "1422190", "order": "Poales", "family": "Poaceae", "scientificName": "Poa pratensis", "scientificNameAuthorship": "L.", "genus": "Poa", "subgenus": "", "specificEpithet": "pratensis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Robert Bebb", "recordNumber": "4018", "verbatimEventDate": "1939-05-21", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Arkansas", "county": "Searcy", "municipality": "", "locality": "Clearings wooded hill", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}