(S (S (PP-SBJ (BASENP (DT 大きな) (NN 群衆)) (IN が)) (COMMA 、) (VP (NP (PP (NP (S-REL (SBAR (SBAR (S (PP-SBJ (BASENP (NN 消火) (NN 隊員)) (IN が)) (VP (PP (NP (PP (BASENP (NN 火事)) (IN の)) (NN 現場)) (IN に)) (VB たどり着く))) (NN の)) (IN に)) (S (PP (BASENP (QP (PRE 約) (NN １)) (NN 時間)) (IN も)) (S-NSBJ (VP (VBV かかっ) (VP (MD た)))))) (NN 原因)) (IN の)) (NN ひとつ)) (VP (MDV で) (VP (MDV あっ) (VP (MD た)))))) (PERIOD 。))
大きな 群衆 が 、 消火 隊員 が 火事 の 現場 に たどり着く の に 約 1 時間 も かかっ た 原因 の ひとつ で あっ た 。
The large crowds were part of the reason it took around an hour for fire service members to reach the scene of the fire .