A large yellow vehicle leads two others in a race.
Motorcycles are racing.
large vehicle is contradictory to motorcycles
exists e1 s1 s2 x1 x2 x3.(in(e1,x3) & n_race(x3) & Theme(e1,x2) & Actor(e1,x1) & v_lead(e1) & -(x2 = x1) & n_person(x1) & n_person(x2) & card_eq_2(x2) & n_vehicle(x1) & a_yellow(s2) & Theme(s2,x1) & a_large(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_race(e1) & n_motorcycle(x1))