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": ""}
    ) RENSSELAER    KGSG CORNACEAE     1509043 l?t  l.     canadensis DWUp   42.7245 O   S_E0, troy [coordinates are for prospect park.]   8w CORNUS CANADENSIS   C -73.6857  9#v& cornus   $ douglass houghton United States l4J   1830-05  QJ6% 
{"catalogNumber": "1509043", "order": "", "family": "Cornaceae", "scientificName": "Cornus canadensis", "scientificNameAuthorship": "L.", "genus": "Cornus", "subgenus": "", "specificEpithet": "canadensis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Douglass Houghton", "recordNumber": "", "verbatimEventDate": "1830-05", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Rensselaer", "municipality": "", "locality": "Troy [Coordinates are for Prospect Park.]", "decimalLatitude": "42.7245", "decimalLongitude": "-73.6857", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}