A man surfing in rough water
The surf is rough at the beach
The surfing at the beach is hard because the water is rough.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_water(x3) & a_rough(s1) & Theme(s1,x3) & n_surfing(x1) & of(x1,x2) & n_man(x2))
exists s1 x1 x2.(n_beach(x2) & n_surf(x1) & at(s1,x2) & Theme(s1,x1) & a_rough(s1))