Two protesters hold signs during a rally.
Riot police at a rally
Riot police are in place to control protesters. They are on the opposite sides of a rally.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & during(x2,x3) & n_rally(x3) & n_sign(x2) & n_protester(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_rally(x3) & n_police(x1) & (x1 = x2) & ne_nam_riot(x2))