Table schema:
CREATE TABLE table_name_45 (co_drivers VARCHAR, pos VARCHAR, team VARCHAR, laps VARCHAR, class VARCHAR)

Question: Who are the co-drivers the risi competizione gt2 class that went under 329 laps and recorded a DNF?
SQL: SELECT co_drivers FROM table_name_45 WHERE laps < 329 AND class = "gt2" AND team = "risi competizione" AND pos = "dnf"