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": ""}
    C+ 1465874  2 X 1914-08-09    @=` BAY     wkYh  S.N.  ^a (Sarg.) Eggl.     ) michigan  a FRED R. CLARK crataegus mollis var. sera w_   sera o       43.594468 %?   B , [IN THE HAND OF C.L. PORTER]
{"catalogNumber": "1465874", "order": "", "family": "", "scientificName": "Crataegus mollis var. sera", "scientificNameAuthorship": "(Sarg.) Eggl.", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "sera", "identifiedBy": "", "recordedBy": "Fred R. Clark", "recordNumber": "s.n.", "verbatimEventDate": "1914-08-09", "habitat": "", "occurrenceRemarks": "[In the hand of C.L. Porter]", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Bay", "municipality": "", "locality": "", "decimalLatitude": "43.594468", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}