A family playing on a sand dune.
A family deep sea diving
A family cannot be deep sea diving while playing on a sand dune.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_dune(x3) & of(x3,x4) & n_sand(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_family(x1))
exists s1 x1 x2 x3.(a_topic(x1) & n_diving(x1) & of(x1,x3) & n_sea(x3) & a_deep(s1) & Theme(s1,x1) & of(x1,x2) & n_family(x2))