Banning ivory is the surest road to extinction for the African elephant, argue leaders in those countries.
Keeping ivory legal allows more ivory to be sold.
( z1 allow :ARG0 ( z2 keep :ARG1 ( z3 legal :ARG1 ( z4 ivory ) ) ) :ARG1 ( z5 sell :ARG1 ( z6 ivory :mod ( z7 more ) ) ) )