A man surfs on a huge green wave.
The man is in the water.
If a man is on a wave he must be in the water.
exists e1 s1 s2 x1 x2.(on(e1,x2) & n_wave(x2) & a_green(s2) & Theme(s2,x2) & a_huge(s1) & Theme(s1,x2) & Actor(e1,x1) & v_surf(e1) & n_man(x1))
exists p1 x1 x2.(n_water(x2) & n_man(x1) & in(x1,x2))