People in blue uniforms stand on the street as observers watch from the sidewalk.
Some police are waiting for a crowd to leave.
The people in blue uniforms are not necessarily police, and the observers may not be a crowd that the police want to leave.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_sidewalk(x7) & n_street(x5) & from(e2,x7) & Theme(e2,x6) & Actor(e2,x1) & v_watch(e2) & n_thing(x6) & in(x1,x2) & on(e1,x5) & as(e1,x4) & n_observer(x4) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_uniform(x2) & a_blue(s1) & Theme(s1,x2) & n_people(x1))
exists e1 p1 x1 x2.(for(e1,x2) & Topic(x2,p1) & exists e2.(Actor(e2,x2) & v_leave(e2)) & n_crowd(x2) & Actor(e1,x1) & v_wait(e1) & n_police(x1))