A surfer is on a wave.
A young woman surfing in the ocean.
A surfer is on a wave but it does not imply that the surfer is a young woman.
exists p1 x1.(exists x2.(on(x1,x2) & n_wave(x2)) & n_surfer(x1))
exists e1 s1 x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_surf(e1) & (x1 = x2) & n_woman(x1) & a_young(s1) & Theme(s1,x1))