Which region does "Supplier#000000129" belong to?
"Supplier#000000129" is the name of the supplier which refers to s_name; Which region refers to r_name;
SELECT T3.r_name FROM nation AS T1 INNER JOIN supplier AS T2 ON T1.n_nationkey = T2.s_nationkey INNER JOIN region AS T3 ON T1.n_regionkey = T3.r_regionkey WHERE T2.s_name = 'Supplier#000000129'