(S (S (BASENP (DT The) (NN attacker)) (VP (VP (VBD was) (VP (VBG wearing) (NP (BASENP (DT an) (NN explosive)) (VP (VBN strapped) (PP (TO to) (BASENP (PRPD his) (NN torso))))))) (CONJP (COMMA ,) (CC but)) (VP (VP (VBD was) (RB not)) (VP (VP (VBN patted) (PRT (RP down))) (PP (IN by) (BASENP (NN security))))))) (PERIOD .))