user: Question: How many communes have the chief town as Dijon?
Columns: ['Dep.', 'Chief town', 'Arrondissement', 'Population (1999)', 'Area (Square km)', 'Pop density', 'Cantons', 'Communes']
Types: ['text', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['01', 'Belley', 'Belley', '79,656', 1307.0, 61.0, 9.0, 107.0]
SQL:

assistant: SELECT COUNT("Communes") FROM "Table" WHERE "Chief town" = 'Dijon';