World leaders expressed concern on Thursday that North Korea will quit six-party nuclear disarmament talks and will  bolster its nuclear weapons arsenal.
North Korea will not bolster its nuclear arsenal.
( z1 bolster :polarity - :ARG0 ( z2 country :name ( z3 name :op "North" :op "Korea" ) ) :ARG1 ( z4 arsenal :mod ( z5 nucleus ) :poss z2 ) )