user: Question: Which representative was the Ambassador Extraordinary and Plenipotentiary and had a Termination of Mission date September 20, 1996?
Columns: ['Representative', 'Title', 'Presentation of Credentials', 'Termination of Mission', 'Appointed by']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Robert L. Flanagin', "Chargé d'Affaires ad interim", 'Nov 25, 1975', 'Mar 25, 1976', 'Gerald Ford']
SQL:

assistant: SELECT "Representative" FROM "Table" WHERE "Title" = 'Ambassador Extraordinary and Plenipotentiary' AND "Termination of Mission" = 'September 20, 1996';