A man in a dark wetsuit surfing in a blue watered ocean.
A man is sitting on a couch.
If a man is surfing he is not sitting on a couch.
exists s1 s2 s3 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & in(x2,x4) & n_ocean(x4) & a_watered(s3) & Theme(s3,x4) & a_blue(s2) & Theme(s2,x4) & n_surfing(x2) & of(x2,x3) & n_wetsuit(x3) & a_dark(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))