CREATE TABLE table_4456 ("Shipyard" TEXT, "Laid down" TEXT, "Launched" TEXT, "Commissioned" TEXT, "Fleet" TEXT, "Status" TEXT)

Tell me the launched for august 31, 1964
SELECT "Launched" FROM table_4456 WHERE "Commissioned" = 'august 31, 1964'
SELECT "Launched" FROM "table_4456" WHERE "Commissioned" = 'august 31, 1964'