(S (S (BASENP (DT The) (NNS demonstrators)) (VP (VBD were) (VP (VBG protesting) (PP (IN against) (NP (BASENP (DT the) (NNP Okhta) (NNP Center)) (COMMA ,) (NP (NP (NP (DT a) (NP (JJ proposed) (BASENP (ADJP (JJ supertall) (JJ 77-story)) (NN skyscraper)))) (PP (IN for) (BASENP (DT the) (NN gas) (NN company) (NNP Gazprom)))) (VP (VBG measuring) (NP (BASENP (NN 400) (NNS metres)) (PRN (LRB -LRB-) (BASENP (NN 1,300) (NNS feet)) (RRB -RRB-)))))))))) (PERIOD .))