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": ""}
 5rq^w 1418839  dchotomiflorum nzpk    panicum x   x S.N.  Ltm- 1896-09 missouri Z   152  p>    KVKp Michx.       k<,~ POALES GEORGE W. LETTERMAN T0z_  Allenton P~:m   panicum dichotomiflorum  A    lA St. Louis   Nx POACEAE  ) UNITED STATES  
{"catalogNumber": "1418839", "order": "Poales", "family": "Poaceae", "scientificName": "Panicum dichotomiflorum", "scientificNameAuthorship": "Michx.", "genus": "Panicum", "subgenus": "", "specificEpithet": "dichotomiflorum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "George W. Letterman", "recordNumber": "s.n.", "verbatimEventDate": "1896-09", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Missouri", "county": "St. Louis", "municipality": "", "locality": "Allenton", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "152", "maximumElevationInMeters": ""}