(S (S (S (PP-SBJ (NP (PP (BASENP (NN ２) (NN 人)) (IN の)) (NN 警官)) (IN が)) (VP (NN 負傷) (VBV し))) (COMMA 、) (S (S (PP-SBJ (BASENP (DT その) (NN １) (NN 人)) (IN は)) (VP (PP (NP (PP (BASENP (NN 鉄)) (IN の)) (NN 棒)) (IN で)) (VP (VBO 叩か) (VP (VBV れ))))) (COMMA 、) (S (PP-SBJ (BASENP (QP (RB もう) (NN １)) (NN 人)) (IN は)) (VP (PP-OBJ (BASENP (NN ダーツ)) (IN を)) (VP (VP (VBO 投げつけ) (VP (VBV られ))) (VP (MD た))))))) (PERIOD 。))
２ 人 の 警官 が 負傷 し 、 その １ 人 は 鉄 の 棒 で 叩か れ 、 もう １ 人 は ダーツ を 投げつけ られ た 。
Two police officers were injured , one when hit by an iron bar and another when he was hit with a dart .