(S (S (BASENP (NNP Mahameed)) (VP (VBZ believes) (SBAR (S (NP (BASENP (NNS contributions)) (PP (IN such) (PP (IN as) (BASENP (PRP his))))) (VP (VBP are) (ADJP (JJ necessary) (PP (TO to) (BASENP (DT the) (NNP Mideast) (NN peace) (NN effort))))))))) (PERIOD .))