Two motorcycle racers are driving on a race course.
Tall humans driving
Not all motorcycle racers need be tall.
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 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_drive(e1) & (x1 = x3) & n_human(x1) & (x1 = x2) & ne_nam_tall(x2))