(S (S (NP (NP (NP (BASENP (NN Guitarist) (NNP David) (NNP Gilmour)) (COMMA ,) (BASENP (NN bassist) (NNP Roger) (NNP Waters))) (COMMA ,) (BASENP (NN drummer) (NNP Nick) (NNP Mason))) (CONJP (COMMA ,) (CC and)) (BASENP (NN keyboardist) (NNP Richard) (NNP Wright))) (VP (MD will) (VP (VB play) (NP (NP (BASENP (PRPD their) (JJ first) (NN performance)) (ADVP (RB together))) (PP (IN since) (S (VP (VP (VBG playing) (PP (IN at) (NP (BASENP (NNP Earls) (NNP Court)) (COMMA ,) (BASENP (NNP London))))) (PP (IN in) (BASENP (NN 1981)))))))))) (PERIOD .))