(S (S (S (BASENP (PRP They)) (VP (VBD were) (ADJP (JJ unsupervised)))) (SBAR (WHADVP (WRB when)) (S (BASENP (PRP they)) (VP (VBD were) (VP (VP (VBG shooting) (BASENP (DT the) (NN gun))) (PP (IN at) (NP (NP (BASENP (DT a) (NN bucket)) (SBAR (WHNP (WDT that)) (S (VP (VBD was) (VP (VBG hanging) (PP (IN in) (BASENP (DT a) (NN tree)))))))) (CC and) (NP (BASENP (DT a) (NN tin) (NN can)) (SBAR (WHNP (WDT that)) (S (VP (VBD was) (VP (VBN placed) (PP (IN on) (BASENP (DT a) (NN box))))))))))))))) (PERIOD .))