CREATE TABLE table_15676 ("Artist" TEXT, "Country of origin" TEXT, "Period active" TEXT, "Release-year of first charted record" FLOAT, "Genre" TEXT, "Claimed sales" TEXT)

What is the number of claimed sales in the rock genre?
SELECT "Claimed sales" FROM table_15676 WHERE "Genre" = 'rock'
SELECT "Claimed sales" FROM "table_15676" WHERE "Genre" = 'rock'