It has become increasingly clear that Iran is making rapid progress toward attaining a nuclear weapons capability as U.S. officials have confirmed the presence of various nuclear sites that Tehran has failed to disclose
Tehran did not disclose all of its nuclear sites.
( z1 disclose :polarity - :ARG0 ( z2 city :name ( z3 name :op "Tehran" ) ) :ARG1 ( z4 site :mod ( z5 nucleus ) :mod ( z6 all ) :poss z2 ) )