user: Question: Which position has a Year larger than 1997, and a Class Position of 3rd?
Columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1997.0, 'La Filière Elf', 'Henri Pescarolo Emmanuel Clérico', 'LMP', 319.0, '7th', '4th']
SQL:

assistant: SELECT "Pos." FROM "Table" WHERE "Year" > 1997.0 AND "Class Pos." = '3rd';