(S (S (BASENP (PRP They)) (VP (VBP have) (VP (ADVP (RB further)) (VP (VP (VBN called) (PP (IN upon) (BASENP (DT the) (JJ Pakistani) (NNS authorities)))) (S (VP (VP (VP (TO to) (VP (VB investigate) (NP (BASENP (NNS attacks)) (PP (IN on) (BASENP (NNS journalists)))))) (CC and) (VP (TO to) (VP (VB try) (NP (BASENP (DT those)) (ADJP (JJ responsible)))))) (PP (IN in) (NP (BASENP (NNS line)) (PP (IN with) (NP (BASENP (ADJP (RB internationally) (VBN recognized)) (NNS standards)) (PP (IN of) (BASENP (JJ human) (NNS rights))))))))))))) (PERIOD .))