(S (S (SBAR (S (SBAR (S-NSBJ (VP (PP-OBJ (NP (NP (S-REL-NSBJ (VP (PP (BASENP (NN 木)) (IN に)) (VP (VP (VBV 掛かっ) (INTE て)) (VP (VBV い) (VP (MD た)))))) (NN バケツ)) (CC と) (NP (S-REL-NSBJ (VP (PP (BASENP (NN 箱)) (IN に)) (VP (VP (VBO 置か) (VP (VBV れ))) (VP (MD た))))) (BASENP (NN ブリキ) (NN 缶)))) (IN を)) (VBV 狙っ))) (INTE て)) (S-NSBJ (VP (PP-OBJ (BASENP (NN 銃)) (IN を)) (VP (VP (VBV 撃っ) (INTE て)) (VP (VBV い) (VP (MD た))))))) (NN とき)) (COMMA 、) (S (PP (BASENP (NN 彼ら)) (IN は)) (VP (VP (VP (VP (NN 監視) (VBO さ)) (VP (VBV れ))) (INTE て)) (VP (VBV い) (VP (MDV なかっ) (VP (MD た))))))) (PERIOD 。))
木 に 掛かっ て い た バケツ と 箱 に 置か れ た ブリキ 缶 を 狙っ て 銃 を 撃っ て い た とき 、 彼ら は 監視 さ れ て い なかっ た 。
They were unsupervised when they were shooting the gun at a bucket that was hanging in a tree and a tin can that was placed on a box .