Two young males wear silver helmets.
The men are race car drivers.
Just because these young men are wearing silver helmets it doesn't mean they are race care drivers. They could have on bicycle helmets and be about ready to ride a bike.
exists e1 s1 s2 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2) & a_silver(s2) & Theme(s2,x2) & n_male(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_man(x1) & exists x2 x3 x4.((x1 = x2) & n_driver(x2) & of(x2,x4) & n_car(x4) & of(x2,x3) & n_race(x3)))