(S (S (SBAR (IN Because) (S (BASENP (DT the) (NN IP) (NN address)) (VP (VBZ is) (VP (VBN shared) (PP (IN by) (BASENP (NNP House) (NN staff) (NNS members))))))) (COMMA ,) (S (BASENP (PRP it)) (VP (VP (VBZ is) (ADJP (JJ uncertain))) (SBAR (SBAR (IN whether) (CC or) (RB not)) (S (NP (NP (DT the) (NP (JJ same) (BASENP (NN person) (PRN (LRB -LRB-) (NNS s) (RRB -RRB-))))) (ADJP (JJ responsible) (PP (IN for) (BASENP (DT the) (JJ previous) (NN vandalism))))) (VP (VP (VBP are) (ADVP (RB also))) (ADJP (JJ responsible) (PP (IN for) (BASENP (DT the) (JJS latest)))))))))) (PERIOD .))