CREATE TABLE table_410 ("Name" TEXT, "Pennant" TEXT, "Builder" TEXT, "Laid Down" TEXT, "Launched" TEXT, "Commissioned" TEXT, "Fate" TEXT)

What are the commissioned for scotts, greenock and chieftain?
SELECT "Commissioned" FROM table_410 WHERE "Builder" = 'Scotts, Greenock' AND "Name" = 'Chieftain'
SELECT "Commissioned" FROM "table_410" WHERE "Builder" = 'Scotts, Greenock' AND "Name" = 'Chieftain'