CREATE TABLE table_57764 ("Name" TEXT, "Pennant" TEXT, "Builder" TEXT, "Laid Down" TEXT, "Launched" TEXT, "Commissioned" TEXT)

What is the laid down date of the destroyer with a r29 pennant?
SELECT "Laid Down" FROM table_57764 WHERE "Pennant" = 'r29'
SELECT "Laid Down" FROM "table_57764" WHERE "Pennant" = 'r29'