(S (S (BASENP (DT The) (NN dam)) (VP (VBZ replaces) (NP (BASENP (DT an) (JJ old) (NN dam)) (COMMA ,) (VP (VP (ADVP (RB first)) (VP (VBN built) (PP (IN in) (BASENP (NN 1911))))) (CC but) (VP (ADVP (RB subsequently)) (VP (VBN expanded) (BASENP (JJ several) (NNS times)))))))) (PERIOD .))