The children are looking upward while waving their arms.
Some children are looking up.
The children looking up are also looking upward.
exists e1 e2 s1 x1 x2.(n_arm(x2) & of(x2,x1) & n_thing(x1) & n_child(x1) & while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_wave(e2) & a_upward(s1) & Manner(e1,s1) & Actor(e1,x1) & v_look(e1))
exists e1 s1 x1.(a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_look(e1) & n_child(x1))