Which part and supplier have the most profit?
part refers to p_name; supplier refers to s_name; the most profit refers to max(subtract(multiply(l_extendedprice, subtract(1, l_discount)), multiply(ps_supplycost, l_quantity)))
SELECT T3.p_name, T4.s_name FROM partsupp AS T1 INNER JOIN lineitem AS T2 ON T1.ps_suppkey = T2.l_suppkey INNER JOIN part AS T3 ON T1.ps_partkey = T3.p_partkey INNER JOIN supplier AS T4 ON T1.ps_suppkey = T4.s_suppkey ORDER BY T2.l_extendedprice * (1 - T2.l_discount) - T1.ps_supplycost * T2.l_quantity DESC LIMIT 1