(S (S (BASENP (PRP He)) (VP (VP (VBD replaced) (BASENP (JJ original) (NN drummer) (NNP Skip) (NNP Spence))) (CC and) (VP (VP (VBD played) (PP (IN with) (BASENP (NNP Jefferson) (NNP Airplane)))) (PP (IN at) (BASENP (DT the) (JJ legendary) (NNP Woodstock) (CC and) (NNP Altamont) (NN rock) (NNS festivals)))))) (PERIOD .))