Two young children are sitting on a statue of a lion.
The lion is sitting on a statue of two children.
Either the children are sitting on a statue of a lion, or the lion is sitting on a statue of two children.  Both cannot be happening at the same time
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 e1 x1 x2 x3.(n_lion(x1) & on(e1,x2) & of(x2,x3) & n_child(x3) & card_eq_2(x3) & n_statue(x2) & Actor(e1,x1) & v_sit(e1))