A baby smiling for the camera.
The baby is smiling.
in a both sentence baby and camera are different.
exists e1 x1 x2 x3.(n_camera(x3) & a_topic(x1) & for(e1,x3) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_baby(x1))
exists e1 x1.(n_baby(x1) & Actor(e1,x1) & v_smile(e1))