user: Question: Which Class Pos has a Year larger than 1997, a Team of Corvette Racing, a Class of GT1, and 327 laps?
Columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1997.0, 'Moretti Racing', 'Gianpiero Moretti Didier Theys', 'LMP', 321.0, '6th', '3rd']
SQL:

assistant: SELECT "Class Pos." FROM "Table" WHERE "Year" > 1997.0 AND "Team" = 'Corvette Racing' AND "Class" = 'GT1' AND "Laps" = 327.0;