(S (S (NP (BASENP (NNP Donald) (NNP Rothwell)) (PRN (COMMA ,) (NP (NP (BASENP (DT a) (NNP Professor)) (PP (IN of) (BASENP (NNP International) (NNP Law)))) (PP (IN at) (NP (BASENP (DT the) (NNP University)) (PP (IN of) (BASENP (NNP Sydney)))))) (COMMA ,))) (VP (VBZ has) (VP (VBN said) (SBAR (IN that) (S (S (PRN (COMMA ,) (PP (IN unlike) (NP (BASENP (NNS countries)) (PP (IN such) (PP (IN as) (BASENP (NNP Singapore)))))) (COMMA ,)) (S (BASENP (PRP it)) (VP (VP (MD may) (RB not)) (VP (VB be) (ADJP (JJ long)))))) (SBAR (IN before) (S (BASENP (DT the) (NN two)) (VP (VBP are) (VP (VBN executed)))))))))) (PERIOD .))