(S (S (BASENP (PRP It)) (VP (VBD appeared) (PP (IN during) (NP (BASENP (DT the) (NN end)) (PP (IN of) (NP (BASENP (DT the) (JJ first) (NN generation)) (PP (IN of) (BASENP (NNP P2P) (NNS networks))))))))) (PERIOD .))