Two officers sit on horses in a urban setting.
Two officers sit on horses during a demonstration, ready to subdue the crowd if necessary.
Not all sitting on horses is done during a demonstration, and not prepared to subdue the crowd.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_setting(x3) & a_urban(s1) & Theme(s1,x3) & on(e1,x2) & n_horse(x2) & Actor(e1,x1) & v_sit(e1) & n_officer(x1) & card_eq_2(x1))
exists e1 p1 s1 x1 x2 x3 x4 x5.(n_crowd(x5) & during(e1,x3) & Topic(s1,p1) & Actor(s1,x4) & a_ready(s1) & all s2.((Theme(s2,x4) & a_necessary(s2)) -> exists e2.(Theme(e2,x5) & Actor(e2,x4) & v_subdue(e2))) & (x3 = x4) & n_demonstration(x3) & on(e1,x2) & n_horse(x2) & Actor(e1,x1) & v_sit(e1) & n_officer(x1) & card_eq_2(x1))