A group of men talking behind a truck.
The group of men are construction workers.
Not all groups of men are construction workers.
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & behind(e1,x4) & n_truck(x4) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_man(x2) & n_group(x1))
exists p1 x1 x2.(n_group(x1) & exists x3 x4.((x1 = x3) & n_worker(x3) & of(x3,x4) & n_construction(x4)) & of(x1,x2) & n_man(x2))