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": ""}
     ACHNATHERUM  v@      ?I John H. Ehlers Achmatherum nelsonii Z *G    (SCRIBN.) BARKWORTH XC    GENESEE MT. DENVER MOUNTAIN PARKS U     +m 8133  WOODED SLOPE ~S  poaceae     L`[= 1941-07-18   
{"catalogNumber": "", "order": "", "family": "Poaceae", "scientificName": "Achnatherum nelsonii", "scientificNameAuthorship": "(Scribn.) Barkworth", "genus": "Achnatherum", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John H. Ehlers", "recordNumber": "8133", "verbatimEventDate": "1941-07-18", "habitat": "Wooded slope", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Genesee Mt. Denver Mountain Parks", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}