Three children are playing in sand near to the beach.
Three children build sand castles.
Just because children play in sand does not mean they build sand castles.
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.(Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3) & n_child(x1) & card_eq_3(x1))