Question: In the parts supply by Supplier#000000654, list the top five parts with the most supply cost in descending order of supply cost.
SQL: SELECT T2.ps_partkey FROM supplier AS T1 INNER JOIN partsupp AS T2 ON T1.s_suppkey = T2.ps_suppkey WHERE T1.s_name = 'Supplier#000000654' ORDER BY T2.ps_supplycost DESC LIMIT 5