There are buildings in the background.
The background consists of buildings.
If the background "consists of buildings," there must be buildings in the background.
exists p1 x1 x3.(n_background(x3) & exists x2.((x1 = x2) & in(x2,x3) & n_building(x2)))
exists e1 x1 x2.(n_background(x1) & of(e1,x2) & n_building(x2) & Actor(e1,x1) & v_consist(e1))