A man surfing a wave.
The man is doing tricks
You can not infer he is doing tricks.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_surf(e1) & n_wave(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2))