Banning ivory is the surest road to extinction for the African elephant, argue leaders in those countries.
Leaders of those countries don't want to ban ivory.
We would assume this is the case, but we don't know for sure.
( z1 want :polarity - :ARG0 ( z2 person :ARG0-of ( z3 lead :ARG1 ( z4 country :mod ( z5 that ) ) ) ) :ARG1 ( z6 ban :ARG0 z2 :ARG1 ( z7 ivory ) ) )