(S (S (BASENP (NNS Militants)) (VP (VP (VP (VP (VBD carried) (PRT (RP out))) (BASENP (JJ several) (JJ retaliatory) (NNS attacks))) (BASENP (JJ last) (NN month))) (SBAR (WHNP (WDT that)) (S (VP (VBD killed) (NP (BASENP (NNS hundreds)) (PP (IN of) (BASENP (NNS people))))))))) (PERIOD .))