CREATE TABLE table_29188 ("Rank" FLOAT, "Rider" TEXT, "Sat 21 Aug" TEXT, "Mon 23 Aug" TEXT, "Tues 24 Aug" TEXT, "Wed 25 Aug" TEXT, "Thurs 26 Aug" TEXT, "Fri 27 Aug" TEXT, "Sat 29 Aug" TEXT)

When 8 is the rank what is the Saturday August 21st?
SELECT "Sat 21 Aug" FROM table_29188 WHERE "Rank" = '8'
SELECT "Sat 21 Aug" FROM "table_29188" WHERE "Rank" = '8'