A child smiling in a park
The child's mother is standing in the picture.
The fact that a child is smiling doesn't imply the child's mother is standing.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_park(x3) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_child(x1))
exists e1 x1 x2 x3.(n_picture(x3) & n_mother(x2) & of(x2,x1) & n_child(x1) & in(e1,x3) & Actor(e1,x2) & v_stand(e1))