(S (S (NP (BASENP (NN Six) (NNS astronauts)) (PRN (COMMA ,) (NP (NP (NP (NP (NP (BASENP (NNP Steve) (NNP Lindsey)) (COMMA ,) (BASENP (NNP Eric) (NNP Boe))) (COMMA ,) (BASENP (NNP Alvin) (NNP Drew))) (COMMA ,) (BASENP (NNP Nicole) (NNP Stott))) (COMMA ,) (BASENP (NNP Michael) (NNP Barratt))) (CONJP (COMMA ,) (CC and)) (BASENP (NNP Steve) (NNP Bowen))) (COMMA ,))) (VP (VBP are) (VP (VBG participating) (PP (IN in) (BASENP (DT the) (NN mission)))))) (PERIOD .))