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": ""}
    2484  CORYMBOSA b        B4p 1299036    ipomoea %n     nAY Contact UM Herbarium W.E. BROADWAY P$p      b-`| convolvulaceae  Gordon D. McPherson c a/Z   ROTH *gD     eJ 1909-01-18  $ [ ipomoea corymbosa
{"catalogNumber": "1299036", "order": "", "family": "Convolvulaceae", "scientificName": "Ipomoea corymbosa", "scientificNameAuthorship": "Roth", "genus": "Ipomoea", "subgenus": "", "specificEpithet": "corymbosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Gordon D. McPherson", "recordedBy": "W.E. Broadway", "recordNumber": "2484", "verbatimEventDate": "1909-01-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}