the young children are petting a piglet
Two children are at a petting zoo with a piglet.
Not all piglets are at a petting zoo.
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 p1 x1.(exists s1 x2 x3.(at(x1,x2) & with(x2,x3) & n_piglet(x3) & n_zoo(x2) & a_petting(s1) & Theme(s1,x2)) & n_child(x1) & card_eq_2(x1))