(S (S (QT (DQL ``) (QTC (S (BASENP (PRP I)) (VP (VBP think) (SBAR (S (NP (BASENP (DT both) (NNS leaders)) (PRN (COMMA ,) (BASENP (NNP Olmert) (CC and) (NNP Abbas)))) (VP (VBP are) (ADJP (JJ weak) (COMMA ,) (PP (IN vis-à-vis) (BASENP (PRPD their) (NNS constituencies))))))))) (COMMA ,)) (DQR '')) (S (BASENP (PRP he)) (VP (VBD explained)))) (PERIOD .))