the young children are petting a piglet
Kids are petting an animal.
Just because children are petting a piglet it does not mean they are kids.
exists e1 s1 x1 x2.(n_child(x1) & a_young(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_pet(e1) & n_piglet(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pet(e1) & n_animal(x2) & n_kid(x1))