(S (S (BASENP (DT Some) (NN human) (NNS rights) (NNS experts)) (VP (VBP warn) (SBAR (IN that) (S (BASENP (DT the) (NNS witnesses)) (VP (MD may) (VP (VB be) (VP (VBN persecuted) (PP (IN in) (NP (BASENP (DT a) (NN situation)) (SBAR (WHADVP (WRB where)) (S (BASENP (DT the) (NNS authorities)) (VP (VBP want) (S (VP (VP (TO to) (VP (VB hide) (BASENP (DT the) (NN truth)))) (CONJP (COMMA ,) (CC and)) (VP (ADVP (RB thus)) (VP (TO to) (VP (VB escape) (BASENP (NN responsibility))))))))))))))))))) (PERIOD .))