Father showing sons pictures on his camera.
The sons are not babies.
Just because father showing sons pictures on his camera does not indicate that sons are not babies.
exists e1 x1 x2 x3 x4.(ne_nam_father(x1) & on(e1,x4) & n_camera(x4) & of(x4,x2) & n_male(x2) & Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & n_picture(x2) & of(x2,x3) & n_son(x3))
exists x1.(n_son(x1) & -exists p1 x2.((x1 = x2) & n_baby(x2)))