A construction worker does some grinding on a piece of iron.
The worker is preparing the iron for assembly.
The worker is not said to be preparing the iron for assembly.
exists e1 e2 x1 x2 x3 x4 x5.(for(e1,e2) & on(e2,x4) & of(x4,x5) & n_iron(x5) & n_piece(x4) & Actor(e2,x1) & v_grind(e2) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_thing(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2 x3.(n_iron(x2) & n_worker(x1) & for(e1,x3) & n_assembly(x3) & Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1))