A man is cleaning a large boulder laying on a pallet.
The man works for the city.
A man doesn't always work for the city.
exists e1 e2 s1 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_clean(e2) & on(e1,x4) & n_pallet(x4) & Actor(e1,x3) & v_lay(e1) & (x2 = x3) & n_boulder(x2) & a_large(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_city(x2) & n_man(x1) & for(e1,x2) & Actor(e1,x1) & v_work(e1))