Man with glasses on small roof hammering.
The man is a construction worker.
Just because the man is on a roof hammering does not mean he is a construction worker.
exists s1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & on(x2,x3) & n_hammering(x3) & of(x3,x4) & n_roof(x4) & a_small(s1) & Theme(s1,x3) & n_glass(x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_worker(x2) & of(x2,x3) & n_construction(x3)))