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": ""}
6640 [      6 juglandaceae   _!$4^ Juglans  l. M   Dry wooded slope leading up from old homestead, no buildings present. Associates: Humulus lupulus, Rubus, Pteridium aqulinum, Juglans, Prunus serotina, Acer rubrum. Elev. 726' nUw:   JUGLANS NIGRA d     /Z11[ TIMOTHY L. WALTERS   Manistee ga          1200822 V2y$% 
{"catalogNumber": "1200822", "order": "", "family": "Juglandaceae", "scientificName": "Juglans nigra", "scientificNameAuthorship": "L.", "genus": "Juglans", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Timothy L. Walters", "recordNumber": "6640", "verbatimEventDate": "", "habitat": "Dry wooded slope leading up from old homestead, no buildings present. Associates: Humulus lupulus, Rubus, Pteridium aqulinum, Juglans, Prunus serotina, Acer rubrum. Elev. 726'", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Manistee", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}