user: Question: What's the average year for the Role of Alvin Seville Simon Seville David 'Dave' Seville, and a Title of The Chipmunk Adventure?
Columns: ['Year', 'Title', 'Producer', 'Actor', 'Role']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1987.0, 'The Chipmunk Adventure', 'Yes', 'Yes', "Alvin Seville Simon Seville David 'Dave' Seville"]
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Role" = 'Alvin Seville Simon Seville David ''Dave'' Seville' AND "Title" = 'The Chipmunk Adventure';