A crowded city street.
A city street is experiencing a traffic jam.
A traffic jam does not always occur, simply because the streets are crowded.
exists s1 x1 x2.(a_topic(x1) & n_street(x1) & of(x1,x2) & n_city(x2) & a_crowded(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_experience(e1) & n_jam(x3) & of(x3,x4) & n_traffic(x4) & n_street(x1) & of(x1,x2) & n_city(x2))