A man in a wetsuit rides a surfboard on a wave with a bright sun and blue sky in the background.
The man is a professional surfer.
Just because the man rides a surfboard does not mean he is a professional.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_background(x8) & on(e1,x4) & in(x4,x8) & with(x4,x5) & n_sky(x7) & a_blue(s2) & Theme(s2,x7) & n_sun(x6) & a_bright(s1) & Theme(s1,x6) & subset_of(x7,x5) & subset_of(x6,x5) & n_wave(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_surfboard(x3) & in(x1,x2) & n_wetsuit(x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2.((x1 = x2) & n_surfer(x2) & a_professional(s1) & Theme(s1,x2)))