(S (S (SBAR (S (PP-SBJ (BASENP (NN 警察)) (IN が)) (VP (VP (VBO 締め出さ) (VP (VBV れ))) (VP (MD た)))) (NN 時)) (COMMA 、) (S (PP-SBJ (BASENP (NN 銃撃)) (IN は)) (VP (VBO 起こら) (VP (MDV なかっ) (VP (MD た)))))) (PERIOD 。))
警察 が 締め出さ れ た 時 、 銃撃 は 起こら なかっ た 。
No shots were fired when the police were locked out .