The surfer is riding a wave back towards the beach.
The surfer is in the water.
if the surfer is riding a wave, they are in the water
exists e1 s1 x1 x2 x3.(n_beach(x3) & n_surfer(x1) & towards(e1,x3) & a_back(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wave(x2))
exists p1 x1 x2.(n_water(x2) & n_surfer(x1) & in(x1,x2))