A dog runs on the grass in a yard, a gazebo in the background.
The dog in the picture is small and brown.
The first sentence simply mentions a dog and doesn't describe him as small or brown.
exists e1 x1 x2 x3 x4 x5.(n_background(x5) & n_grass(x2) & rel(e1,x4) & in(x4,x5) & n_gazebo(x4) & in(e1,x3) & n_yard(x3) & on(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists s1 s2 x1 x2 x3 x4.(n_picture(x4) & n_dog(x3) & n_picture(x2) & n_dog(x1) & Theme(s2,x3) & a_brown(s2) & in(x3,x4) & Theme(s1,x1) & a_small(s1) & in(x1,x2))