A man waving and waterskiing in the middle of a lake.
A waterskiier waves at a boat.
A man waving and waterskiing in the middle of a lake  does not mean he waves at a boat
exists e1 e2 x1 x2 x3 x4 x5.(n_middle(x4) & a_topic(x1) & in(e2,x4) & of(x4,x5) & n_lake(x5) & Actor(e2,x3) & v_waterskie(e2) & (x1 = x3) & Actor(e1,x2) & v_wave(e1) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_boat(x3) & n_wave(x1) & of(x1,x2) & n_waterskiier(x2))