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": ""}
Nassella mucronata &W      (KUNTH) R.W.POHL nassella S_,,   e2   1418453  agfzX mucronata    u[ 191403-10   United States >,           Y LA JOLLA   FREDERIC E. CLEMENTS & EDIT:H G. CLEMENTS @  poales  e&     
{"catalogNumber": "1418453", "order": "Poales", "family": "", "scientificName": "Nassella mucronata", "scientificNameAuthorship": "(Kunth) R.W.Pohl", "genus": "Nassella", "subgenus": "", "specificEpithet": "mucronata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Frederic E. Clements & Edith G. Clements", "recordNumber": "", "verbatimEventDate": "1914-03-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "La Jolla", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}