A man fishing on the beach.
The man is catching a lot of fish.
Fishing is not necessarily catching.
exists x1 x2 x3.(n_beach(x3) & a_topic(x1) & on(x1,x3) & n_fishing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & of(x2,x3) & n_fish(x3) & n_lot(x2))