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": ""}
 1951-05-20 9,  11881  R2[   2 dewey ex spreng.   illinois 0|    &0Z X low woods   ` 1430664     .o sprengelii   !A#Sf UNITED STATES  whiteside [    +pF Ustick Tp., East of Fulton  virginius h. chase  mh      
{"catalogNumber": "1430664", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "Dewey ex Spreng.", "genus": "", "subgenus": "", "specificEpithet": "sprengelii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Virginius H. Chase", "recordNumber": "11881", "verbatimEventDate": "1951-05-20", "habitat": "Low woods", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Illinois", "county": "Whiteside", "municipality": "", "locality": "Ustick Tp., East of Fulton", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}