CREATE TABLE table_27973 ("#" FLOAT, "Airdate" TEXT, "No. of couples" FLOAT, "First couple" TEXT, "Second couple" TEXT, "Third couple" TEXT, "Fourth couple" TEXT, "Viewers  ( millions ) " TEXT, "ITV1 weekly ranking" FLOAT)

Who was the second couple for the episode having an ITV1 ranking of 29?
SELECT "Second couple" FROM table_27973 WHERE "ITV1 weekly ranking" = '29'
SELECT "Second couple" FROM "table_27973" WHERE "ITV1 weekly ranking" = '29'