A man surfing on a surfboard in the sea with waves behind him.
A man surfing during a hurricane.
You do not surf in a hurricane.
exists e1 x1 x2 x3 x4 x5.(n_male(x4) & n_sea(x4) & a_topic(x1) & on(e1,x3) & in(x3,x4) & with(x4,x5) & behind(x5,x4) & n_wave(x5) & n_surfboard(x3) & Actor(e1,x2) & v_surf(e1) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & during(x1,x3) & n_hurricane(x3) & n_surfing(x1) & of(x1,x2) & n_man(x2))