A man sits on the gravel by an ocean.
A person is looking at the sea.
By an ocean does not mean looking at the sea.
exists e1 x1 x2 x3.(n_gravel(x2) & by(e1,x3) & n_ocean(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2.(n_sea(x2) & at(e1,x2) & Actor(e1,x1) & v_look(e1) & n_person(x1))