Two men wearing reflective vests walking on the side of the road.
The two men are wearing hard hats.
In fact that people wearing reflective vests walking on the side of the road does not imply they are wearing hard hats.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(n_road(x6) & n_side(x5) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & on(e1,x5) & of(x5,x6) & Actor(e1,x4) & v_walk(e1) & (x3 = x4) & n_vest(x3) & a_reflective(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_man(x1) & card_eq_2(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & a_hard(s1) & Theme(s1,x2))