The surfer in the wetsuit is riding a wave.
The surfer in the red wetsuit is riding an enormous wave.
Not all wetsuits are red. The waves don't have to be enormous in order to be able to ride them.
exists e1 x1 x2 x3.(n_wetsuit(x2) & n_surfer(x1) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_wave(x3) & in(x1,x2))
exists e1 s1 s2 x1 x2 x3.(n_wetsuit(x2) & a_red(s1) & Theme(s1,x2) & n_surfer(x1) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_wave(x3) & a_enormous(s2) & Theme(s2,x3) & in(x1,x2))