A man working on a steam engine with a water tower in the background.
There is a water tower behind a man at work.
If a water tower is in the background, it is implied it is behind the man.
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_background(x7) & a_topic(x1) & with(e1,x5) & in(x5,x7) & n_tower(x5) & of(x5,x6) & n_water(x6) & on(e1,x3) & n_engine(x3) & of(x3,x4) & n_steam(x4) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))
exists p1 x1 x2 x3 x4 x5.((x1 = x2) & behind(x2,x4) & at(x4,x5) & n_work(x5) & n_man(x4) & n_tower(x2) & of(x2,x3) & n_water(x3))