A surfer in a blue swimsuit is riding the waves.
A surfer is in the ocean.
if the surfer is riding the waves, they are in the ocean.
exists e1 s1 x1 x2 x3.(n_wave(x3) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & in(x1,x2) & n_swimsuit(x2) & a_blue(s1) & Theme(s1,x2) & n_surfer(x1))
exists p1 x1 x2.(n_ocean(x2) & in(x1,x2) & n_surfer(x1))