user: Question: What theme has a mintage of 3527?
Columns: ['Year', 'Theme', 'Artist', 'Mintage', 'Issue price', 'Special notes']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [2006.0, 'Montreal Canadiens', 'N/A', 'N/A', 24.95, 'From Montreal Canadiens Gift Set']
SQL:

assistant: SELECT "Theme" FROM "Table" WHERE "Mintage" = '3527';