CREATE TABLE table_27654 ("Rank by average" FLOAT, "Place" FLOAT, "Couple" CLOB, "Total points" FLOAT, "Number of dances" FLOAT, "Average" CLOB)

What couple averaged 15.5?
SELECT "Couple" FROM table_27654 WHERE "Average" = '15.5'
SELECT "Couple" FROM "table_27654" WHERE "Average" = '15.5'