A dark figure on a surfboard is riding the waves of some aquamarine colored water.
No one is surfboarding.
Is no one surfing or is there someone surfing
exists e1 s1 s2 s3 x1 x2 x3 x4.(n_wave(x3) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & of(x3,x4) & n_water(x4) & a_colored(s3) & Theme(s3,x4) & a_aquamarine(s2) & Theme(s2,x4) & on(x1,x2) & n_surfboard(x2) & n_figure(x1) & a_dark(s1) & Theme(s1,x1))
-exists e1 x1.(Actor(e1,x1) & v_surfboard(e1) & n_one(x1))