(S (S (S (NP (BASENP (NN Evidence)) (VP (VP (VBG linking) (BASENP (PRP him))) (PP (TO to) (BASENP (DT the) (NN plot))))) (VP (VBD was) (VP (VBN discovered)))) (SBAR (WHADVP (WRB when)) (S (BASENP (PRPD his) (JJ duffel) (NNS bags)) (VP (VBD were) (VP (VBN searched) (PP (IN after) (BASENP (DT the) (NNS attacks)))))))) (PERIOD .))