Seven men sit cross-legged on a roof amid construction material.
Seven men are wearing hard hats.
Just because the men are sitting on a roof amid construction material does not mean they are wearing hard hats.
exists e1 s1 x1 x2 x3 x4 x5.(amid(e1,x4) & n_material(x4) & of(x4,x5) & n_construction(x5) & on(e1,x3) & n_roof(x3) & a_cross-legged(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & (x1 = x2) & ne_nam_seven(x2))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_hat(x3) & a_hard(s1) & Theme(s1,x3) & n_man(x1) & (x1 = x2) & ne_nam_seven(x2))