(S (S (PP (IN On) (BASENP (NNP Saturday))) (COMMA ,) (S (NP (NP (BASENP (NNS militants)) (PP (IN with) (NP (BASENP (NNS ties)) (PP (TO to) (BASENP (NNP Punjab)))))) (PRN (COMMA ,) (NP (CONJP (ADVP (RB as) (RB well)) (IN as)) (BASENP (DT the) (NNP South) (NNP Waziristan) (JJ tribal) (NN region))) (COMMA ,))) (VP (VBD assaulted) (NP (NP (BASENP (DT the) (JJ Pakistani) (NN army) (POS 's)) (NN headquarters)) (PP (IN in) (BASENP (NNP Rawalpindi))))))) (PERIOD .))