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": ""}
  [ 1938-03-13   echinochloa 7   poales U       Echinochloa polystachya 5j;    ^n4! William A. Silveus  xjd Poaceae    (Kunth) Hitchc. sU%    /jc United States texas <Q8BI   gy  POLYSTACHYA     r 2702 
{"catalogNumber": "", "order": "Poales", "family": "Poaceae", "scientificName": "Echinochloa polystachya", "scientificNameAuthorship": "(Kunth) Hitchc.", "genus": "Echinochloa", "subgenus": "", "specificEpithet": "polystachya", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "William A. Silveus", "recordNumber": "2702", "verbatimEventDate": "1938-03-13", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}