A child holds another child while on the ground.
a child is upset and being comforted
One child holding another does not mean that either child is upset or being comforted.
exists e1 x1 x2 x3.(n_ground(x3) & on(e1,x3) & r_while(e1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & -(x2 = x1) & n_child(x1) & n_child(x1))
exists e1 p1 x1 x2 x3.(n_thing(x2) & Theme(e1,x3) & v_comfort(e1) & (x2 = x3) & n_thing(x1) & exists s1 x4.(Theme(s1,x4) & a_upset(s1) & n_child(x4)) & that(x1,p1))