(S (S (BASENP (NNS Prosecutors)) (VP (PRN (COMMA ,) (S (BASENP (PRP he)) (VP (VBD said))) (COMMA ,)) (VP (VBD had) (VP (ADVP (RB always)) (VP (VBN thought) (SBAR (S (NP (EX there)) (VP (VBD were) (NP (NP (BASENP (NNS others)) (PP (IN besides) (BASENP (NNP al-Megrahi)))) (VP (VBN involved) (PP (IN in) (BASENP (DT the) (NN attack))))))))))))) (PERIOD .))