(S (S (S (NP (BASENP (DT The) (NNS accounts)) (PP (IN of) (NP (NP (BASENP (DT the) (NNP Pakistan) (NN army) (POS 's)) (NN offensive)) (PP (IN in) (NP (BASENP (DT the) (NN tribal) (NN region)) (PP (IN near) (BASENP (DT the) (JJ Afghan) (NN border)))))))) (VP (VBP are) (ADJP (JJ difficult) (S (VP (TO to) (VP (VB verify))))))) (COMMA ,) (SBAR (IN as) (S (NP (BASENP (NNS journalists)) (CC and) (BASENP (NN aid) (NNS workers))) (VP (VP (VBP are) (RB not)) (VP (VBN allowed) (PP (IN into) (BASENP (DT the) (NN battle) (NN zone)))))))) (PERIOD .))