A crowded city during rush hour.
A small town.
A small town is not a crowded city.
exists s1 x1 x2 x3.(a_topic(x1) & during(x1,x2) & n_hour(x2) & of(x2,x3) & n_rush(x3) & n_city(x1) & a_crowded(s1) & Theme(s1,x1))
exists s1 x1.(a_topic(x1) & n_town(x1) & a_small(s1) & Theme(s1,x1))