(S (S (BASENP (JJ Other) (NNS revelations)) (VP (VBD included) (SBAR (IN that) (S (NP (BASENP (NNP John) (NNP McCain) (POS 's)) (NNS aides)) (VP (VBD were) (VP (VBN concerned) (PP (IN about) (NP (NP (BASENP (NNP Sarah) (NNP Palin) (POS 's)) (NN failure)) (SBAR (S (VP (TO to) (VP (VP (VP (VB understand) (BASENP (JJ basic) (NNS facts))) (ADVP (RB prior) (PP (TO to) (NP (BASENP (PRPD her) (NNP ABC) (NNP News) (NNS interviews)) (PP (IN with) (BASENP (NNP Charles) (NNP Gibson))))))) (COMMA ,) (PP (VBG including) (SBAR (IN why) (S (NP (BASENP (NNP North) (NNP Korea)) (CC and) (BASENP (NNP South) (NNP Korea))) (VP (VBP are) (BASENP (JJ separate) (NNS countries)))))))))))))))))) (PERIOD .))