Two young children are standing in hall.
The children are in school.
Children standing in a hall are not necessarily in school.
exists e1 s1 x1 x2.(in(e1,x2) & n_hall(x2) & Actor(e1,x1) & v_stand(e1) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_child(x1) & exists x2.(in(x1,x2) & n_school(x2)))