Saudi Arabia, the biggest oil producer in the world, was once a supporter of Osama bin Laden and his associates who led attacks against the United States.
The text says Saudi Arabia led attacks against the United States.
( z1 say :ARG0 ( z2 text ) :ARG1 ( z3 lead :ARG0 ( z4 country :name ( z5 name :op "Saudi" :op "Arabia" ) ) :ARG1 ( z6 attack :ARG1 ( z7 country :name ( z8 name :op "United" :op "States" ) ) ) ) )