A man with red glasses and a white beard is posed with a cane and trees in the background.
The man is Gandalf.
A man with red glasses and a white beard is posed with a cane and trees in the background does not necessary that he  is Gandalf.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_background(x8) & with(e1,x5) & subset_of(x7,x5) & in(x7,x8) & n_tree(x7) & subset_of(x6,x5) & n_cane(x6) & Theme(e1,x1) & v_pose(e1) & with(x1,x2) & subset_of(x4,x2) & n_beard(x4) & a_white(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_glass(x3) & a_red(s1) & Theme(s1,x3) & n_man(x1))
exists p1 x1 x2.(ne_geo_gandalf(x2) & n_man(x1) & (x1 = x2))