Man in hard hat standing in open are behind a fence.
Man standing near a construction site.
Men wear hard hats inside of factories and may not be at a construction site.
exists p1 s1 s2 x1 x2 x3 x4.(exists x5.(behind(x1,x5) & n_fence(x5)) & in(x1,x2) & Theme(s2,x4) & a_open(s2) & (x2 = x4) & n_standing(x2) & of(x2,x3) & n_hat(x3) & a_hard(s1) & Theme(s1,x2) & n_man(x1))
exists x1 x2 x3 x4.(a_topic(x1) & near(x1,x3) & n_site(x3) & of(x3,x4) & n_construction(x4) & n_standing(x1) & of(x1,x2) & n_man(x2))