A busy crosswalk in the city.
The light says "Walk."
There is nothing about the busy crosswalk in the city  that implies the light says 'Walk.'
exists s1 x1 x2.(n_city(x2) & a_topic(x1) & in(x1,x2) & n_crosswalk(x1) & a_busy(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_light(x1) & on(e1,x2) & ne_nam_walk(x2) & Actor(e1,x1) & v_say(e1))