A city situated among the mountains.
Mountains surround a city in Colorado.
We don't know that the city is Colorado.
exists e1 x1 x2.(n_mountain(x2) & among(e1,x2) & Theme(e1,x1) & v_situate(e1) & n_city(x1))
exists e1 x1 x2 x3.(ne_geo_colorado(x3) & ne_nam_mountains(x1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_surround(e1) & n_city(x2))