user: Question: What is the theme of the coin from before 2006?
Columns: ['Year', 'Theme', 'Artist', 'Composition', 'Mintage', 'Issue Price']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [2002.0, 'Triple Cameo Portraits of Queen Elizabeth II', 'Sheldon Beveridge', '58.33% gold, 41.67% silver', 999.0, '$1,095.95']
SQL:

assistant: SELECT "Theme" FROM "Table" WHERE "Year" < 2006.0;