A girl dances with adults in the sand.
A firebreather performs on a beach
A girl who dances would not be a firebreather as the firebreather would be doing things with fire.
exists e1 x1 x2 x3.(n_sand(x3) & with(e1,x2) & in(x2,x3) & n_adult(x2) & Actor(e1,x1) & v_dance(e1) & n_girl(x1))
exists e1 x1 x2.(on(e1,x2) & n_beach(x2) & Actor(e1,x1) & v_perform(e1) & n_firebreather(x1))