(S (S (NP (BASENP (NNP William) (NNP Schulz)) (PRN (COMMA ,) (NP (BASENP (DT the) (JJ executive) (NN director)) (PP (IN of) (NP (BASENP (DT the) (NNP U.S.) (NN branch)) (PP (IN of) (BASENP (NNP Amnesty) (NNP International)))))) (COMMA ,))) (VP (VBD said) (SBAR (IN that) (S (BASENP (NNS governments)) (VP (VBP have) (NP (NP (BASENP (DT an) (NN obligation)) (PP (IN under) (BASENP (JJ international) (NN law)))) (S (VP (TO to) (VP (VB conduct) (NP (BASENP (NNS investigations)) (PP (IN into) (BASENP (JJ alleged) (NN human) (NNS rights) (NNS violations))))))))))))) (PERIOD .))