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": ""}
   -U_2 6992 ovata t   fmc=q WAYNE E. MANNING  1953-09-17  %        ~ UNTED STATES  (Mill.) K. Koch U3-     Fred W. Rapp  | S    R@fJ 3 MI. SE OF VICKSBURG. JUGLANDACEAE JrhTH        y86  42.0893
{"catalogNumber": "", "order": "", "family": "Juglandaceae", "scientificName": "", "scientificNameAuthorship": "(Mill.) K. Koch", "genus": "", "subgenus": "", "specificEpithet": "ovata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Wayne E. Manning", "recordedBy": "Fred W. Rapp", "recordNumber": "6992", "verbatimEventDate": "1953-09-17", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "3 mi. SE of Vicksburg.", "decimalLatitude": "42.0893", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}