(S (S (S (NP (BASENP (NNP Frederic) (NNP Bourdin) (POS 's)) (NN alias)) (VP (VBD was) (VP (VBN discovered)))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT a) (NN teacher)) (VP (VBD watched) (NP (BASENP (DT a) (NN television) (NN program)) (PP (IN about) (NP (BASENP (PRPD his) (NNS exploits)) (CC and) (BASENP (PRPD his) (JJ numerous) (NNS identities))))))))) (PERIOD .))