Two young children are sitting on a statue of a lion.
The children are on vacation.
Children on a vacation don't necessarily imply be sitting on a statue.
exists e1 s1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_lion(x3) & n_statue(x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_child(x1) & exists x2.(on(x1,x2) & n_vacation(x2)))