Two motorcycle racers are driving on a race course.
Two drivers are racing during the final lap of a race.
Racers driving need not mean they are on the final lap of the race.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_course(x3) & of(x3,x4) & n_race(x4) & Actor(e1,x1) & v_drive(e1) & n_racer(x1) & of(x1,x2) & n_motorcycle(x2) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(n_lap(x2) & a_final(s1) & Theme(s1,x2) & during(e1,x2) & of(x2,x3) & n_race(x3) & Actor(e1,x1) & v_race(e1) & n_driver(x1) & card_eq_2(x1))