A man with a jackhammer demolishing cement
This man is working at a construction site.
The fact that a man with a jackhammer is demolishing cement doesn't necessarily mean the man is working at a construction site.
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & n_cement(x2) & of(x2,x4) & n_demolishing(x4) & of(x2,x3) & n_jackhammer(x3) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & at(e1,x2) & n_site(x2) & of(x2,x3) & n_construction(x3) & Actor(e1,x1) & v_work(e1))