Question: Which Team has a Year smaller than 2007, and a Class of GTS?
SQL: SELECT "Team" FROM "2-1616581-4" WHERE "Year" < 2007.0 AND "Class" = 'GTS';

Question: In what year Year has a Co-Drivers of Jérôme Policand Christopher Campbell?
SQL: SELECT SUM("Year") FROM "2-1616581-4" WHERE "Co-Drivers" = 'Jérôme Policand Christopher Campbell';