(S (S (S (BASENP (DT The) (NN protest)) (VP (VBD was) (VP (ADVP (RB originally)) (VP (VBN planned) (PP (IN for) (BASENP (DT the) (NNP Opera) (NNP House) (NN forecourt))))))) (COMMA ,) (S (ADVP (RB however)) (S (BASENP (NNS police)) (VP (VBP have) (VP (VBN declared) (S (BASENP (DT this) (NN area)) (VP (TO to) (VP (VB be) (BASENP (DT an) (NN exclusion) (NN zone)))))))))) (PERIOD .))