user: Question: What is the earliest year a red maple had a mintage over 15000?
Columns: ['Year', 'Theme', 'Mintage', 'Issue Price', 'Finish']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [2004.0, 'Moose', 25000.0, '$69.95', 'Proof']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Theme" = 'red maple' AND "Mintage" > 15000.0;