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": ""}
     _7m IOWA  ,$V L 1935-09-19    [  NUTT. united states  d     sand fl4ts 55B=H  1406063 @   mD  poaceae TUBERCULOS W    aristida ok  372  h   Wisconsin River, just N of village of Arena D>X4:   KM samuel c. wadmond     =vl&^ WISCONSIN
{"catalogNumber": "1406063", "order": "", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "Nutt.", "genus": "Aristida", "subgenus": "", "specificEpithet": "tuberculosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Samuel C. Wadmond", "recordNumber": "372", "verbatimEventDate": "1935-09-19", "habitat": "Sand flats", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Wisconsin", "county": "Iowa", "municipality": "", "locality": "Wisconsin River, just N of village of Arena", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}