An surfer airborne over a wave.
A kid riding a wakeboard in the ocean surf
A person does not surf on a wakeboard.
exists x1 x2 x3.(a_topic(x1) & over(x1,x3) & n_wave(x3) & n_airborne(x1) & of(x1,x2) & n_surfer(x2))
exists e1 x1 x2 x3 x4 x5.(n_surf(x4) & of(x4,x5) & n_ocean(x5) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_wakeboard(x3) & (x1 = x2) & n_kid(x1))