A mountain landscape.
There is snow on the mountain.
You  can not infer there is snow.
exists x1 x2.(a_topic(x1) & n_landscape(x1) & of(x1,x2) & n_mountain(x2))
exists p1 x1 x3.(n_mountain(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_snow(x2)))