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": ""}
    &x( JOHN SAMPLES DIRCA PALUSTRIS   ~[l       e8-b s.n. River bottoms e6Y    fSrXD 1838-0l6-09    1507952 B       palustris        lu MAD RIVE
{"catalogNumber": "1507952", "order": "", "family": "", "scientificName": "Dirca palustris", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "palustris", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John Samples", "recordNumber": "s.n.", "verbatimEventDate": "1838-06-09", "habitat": "River bottoms", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Mad River", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}