Two men in orange uniforms walking down the street.
Two men in orange uniforms smiling.
The first sentence doesn't mention whether the men are smiling.
exists e1 x1 x2 x3 x4 x5.(n_street(x5) & a_topic(x1) & down(e1,x5) & Actor(e1,x4) & v_walk(e1) & (x1 = x4) & in(x1,x2) & n_uniform(x2) & of(x2,x3) & n_orange(x3) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Actor(e1,x4) & v_smile(e1) & (x1 = x4) & in(x1,x2) & n_uniform(x2) & of(x2,x3) & n_orange(x3) & n_man(x1) & card_eq_2(x1))