(SINV (SINV (QTR (QTC (S (BASENP (PRP We)) (VP (VBP believe) (SBAR (S (BASENP (PRP it)) (VP (VP (VBZ is) (ADJP (JJ necessary))) (SBAR (IN for) (S (BASENP (NNP North) (NNP Korea)) (VP (TO to) (VP (VB show) (NP (BASENP (JJ concrete) (NNS actions)) (PP (IN toward) (NP (BASENP (DT the) (NN abandonment)) (PP (IN of) (NP (BASENP (DT all) (JJ nuclear) (NNS weapons)) (CC and) (BASENP (JJ existing) (JJ nuclear) (NNS programs)))))))))))))))) (COMMA ,)) (DQR '')) (SINV (VP (VBD said)) (NP (BASENP (NNP Shinzo) (NNP Abe)) (COMMA ,) (NP (BASENP (DT the) (NNP Prime) (NNP Minister)) (PP (IN of) (BASENP (NNP Japan))))))) (PERIOD .))