Three children are playing in sand near to the beach.
The children are building a sand castle.
Just because children are playing the sand does not mean they are building a sand castle.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & in(e1,x2) & to(s1,x4) & Theme(s1,x3) & a_near(s1) & (x2 = x3) & n_sand(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3))