Two children are sitting while one is standing over them.
There are two children sitting.
Children are sitting means they must be sitting.
exists e1 p1 x1.(exists e2 x2.(over(e2,x1) & Actor(e2,x2) & v_stand(e2) & n_thing(x2) & card_eq_1(x2)) & n_thing(x1) & while(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_child(x2) & card_eq_2(x2))