People in a crowded city street.
People gather after a violent robbery.
A crowded city street full of people does not necessarily mean they have gathered after a violent robbery; it might simply be a street crowded with pedestrians.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_street(x2) & of(x2,x3) & n_city(x3) & a_crowded(s1) & Theme(s1,x2) & n_people(x1))
exists e1 s1 x1 x2.(after(e1,x2) & n_robbery(x2) & a_violent(s1) & Theme(s1,x2) & Actor(e1,x1) & v_gather(e1) & n_people(x1))