A surfer is riding on a breaking wave.
The surfer is sleeping inside.
A surfer cannot be riding and sleeping at the same time.
exists e1 x1 x2 x3.(on(e1,x2) & n_wave(x2) & of(x2,x3) & n_breaking(x3) & Actor(e1,x1) & v_ride(e1) & n_surfer(x1))
exists e1 s1 x1.(n_surfer(x1) & a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sleep(e1))