city workers beside a tree grinder.
There are workings talking outdoors
Not all tree grinders are outdoors.
exists x1 x2 x3 x4.(a_topic(x1) & beside(x1,x3) & n_grinder(x3) & of(x3,x4) & n_tree(x4) & n_worker(x1) & of(x1,x2) & n_city(x2))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_talk(e1) & n_outdoors(x4) & (x2 = x3) & n_workings(x2))