user: Question: Who was seat no 6 when seat no 1 and seat no 5 were Jacques Lachapelle and Donald S. Dutton
Columns: ['Election', 'Mayor', 'Seat no 1', 'Seat no 2', 'Seat no 3', 'Seat no 4', 'Seat no 5', 'Seat no 6']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Before first election', 'John J. Seguier', 'Donald Kirk', 'J. André Laferrière', 'Edward Whittingham', 'J. Albert Clément', 'Arthur E. Ainger', 'J. C. Sarault']
SQL:

assistant: SELECT "Seat no 6" FROM "Table" WHERE "Seat no 1" = 'Jacques Lachapelle' AND "Seat no 5" = 'Donald S. Dutton';