(S (S (PP-SBJ (BASENP (NN 警察)) (IN は)) (COMMA 、) (VP (PRN (SBAR (S (PP (NP (S-REL (PP-SBJ (BASENP (NN 交通) (NN 量)) (IN の)) (ADJP (JJ 多い))) (NN 道路)) (IN で)) (S-NSBJ (VP (VP (VP (VBO 行わ) (VP (VBV れ))) (INTE て)) (VP (VB いる))))) (NN ため))) (COMMA 、) (VP (PP-OBJ (NP (PP (BASENP (NN 抗議) (NN 行動) (NN 参加) (NN 者) (NN 全員)) (IN の)) (BASENP (NN 健康) (CC と) (NN 安全))) (IN を)) (VP (VP (VP (NN 懸念) (VBV し)) (INTE て)) (VP (VB いる)))))) (PERIOD 。))
警察 は 、 交通 量 の 多い 道路 で 行わ れ て いる ため 、 抗議 行動 参加 者 全員 の 健康 と 安全 を 懸念 し て いる 。
The police said that their main concern was the health and safety of everyone as the protest was being held next to a busy road .