(S (BASENP (NNP Dr.) (NNP Weiss)) (VP (VBZ says) (COMMA ,) (QT (DQL ``) (QTC (S (BASENP (PRP It)) (VP (VBZ is) (VP (VBN thought) (SBAR (IN that) (S (PP (IN during) (BASENP (NN pregnancy))) (COMMA ,) (S (NP (BASENP (NNS women) (POS 's)) (BASENP (NN immune) (NNS systems))) (VP (ADVP (RB no) (RBR longer)) (VP (VBD destroyed) (BASENP (DT the) (NN myelin)))))))))) (PERIOD .)) (DQR ''))))