Two children bury a third in the sand.
The children are happy.
To bury in the sand does not imply to be happy.
exists e1 x1 x2 x3.(n_sand(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_bury(e1) & n_third(x2) & n_child(x1) & card_eq_2(x1))
exists s1 x1.(n_child(x1) & Theme(s1,x1) & a_happy(s1))