user: Question: What's Melbourne's average year?
Columns: ['Player', 'Team', 'Opponent', 'Year', 'Score']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Alan Ryan', 'Collingwood', 'Fitzroy', 1935.0, '93–93']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Team" = 'Melbourne';