(S (S (S (BASENP (DT The) (JJ entire) (NN area)) (VP (VBZ has) (VP (VBN been) (VP (VBN closed) (PRT (RP off)))))) (CONJP (COMMA ,) (CC but)) (S (NP (EX there)) (VP (VBP have) (VP (VBN been) (NP (NP (BASENP (JJ recent) (NNS acts)) (PP (IN of) (BASENP (NN violence)))) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (S (BASENP (NNS officials)) (ADJP (JJ worried))))))))))) (PERIOD .))