(S (S (BASENP (NNS Investigators)) (VP (VBP suspect) (NP (BASENP (DT the) (NN involvement)) (PP (IN of) (NP (NP (BASENP (DT a) (JJ Bajaur-based) (JJ militant) (NN group)) (COMMA ,) (NP (BASENP (NNP Jaish-e-Islami) (NNP Pakistan)) (PRN (LRB -LRB-) (BASENP (NNP JIP)) (RRB -RRB-)))) (COMMA ,) (SBAR (WHNP (WPD whose) (NN commander)) (S (VP (VBD was) (VP (ADVP (RB recently)) (VP (VBN injured) (PP (IN after) (NP (BASENP (DT an) (NN attack)) (PP (IN on) (BASENP (PRPD its) (NNS headquarters))))))))))))))) (PERIOD .))