(S (S (NP (NP (NP (BASENP (NNP Matthew) (NNP Norman)) (COMMA ,) (BASENP (NN 19))) (COMMA ,) (NP (BASENP (NNP Si) (NNP Yi) (NNP Chen)) (COMMA ,) (BASENP (NN 20)))) (CONJP (COMMA ,) (CC and)) (NP (BASENP (NNP Tan) (NNP Duc) (NNP Thanh) (NNP Nguyen)) (COMMA ,) (ADJP (JJ aged) (BASENP (NN 27))))) (VP (VBD were) (VP (VBN found) (S (ADJP (JJ guilty) (PP (IN of) (S (VP (VBG exporting) (BASENP (NN narcotics)))))))))) (PERIOD .))