A man working on a job site.
Man at work.
The job site is the man's work.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_site(x3) & of(x3,x4) & n_job(x4) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_work(x2) & n_man(x1))