A crowded city during rush hour.
A metropolis.
A crowded city is a metropolis
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 x1.(a_topic(x1) & n_metropolis(x1))