Police officers on horses stop by a group of boys.
Police officers went on a high speed car chase to catch the woman.
The police can either be on horse or in a car chase. They also can either be stopping a group of boys or a woman.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(x1,x3) & by(x3,x5) & of(x5,x6) & n_boy(x6) & n_group(x5) & n_stop(x3) & of(x3,x4) & n_horse(x4) & n_officer(x1) & of(x1,x2) & n_police(x2))
exists e1 p1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_woman(x8) & Topic(e1,p1) & exists e2.(Theme(e2,x8) & Actor(e2,x1) & v_catch(e2)) & on(e1,x5) & n_chase(x5) & of(x5,x7) & n_car(x7) & of(x5,x6) & n_speed(x6) & a_high(s1) & Theme(s1,x5) & Actor(e1,x3) & v_go(e1) & n_officer(x3) & (x3 = x4) & ne_nam_police(x4) & n_officer(x1) & (x1 = x2) & ne_nam_police(x2))