CREATE TABLE table_15678 ("Artist" CLOB, "Country of origin" CLOB, "Period active" CLOB, "Release-year of first charted record" FLOAT, "Genre" CLOB, "Claimed sales" CLOB)

What was the active period for the pop genre?
SELECT "Period active" FROM table_15678 WHERE "Genre" = 'pop'
SELECT "Period active" FROM "table_15678" WHERE "Genre" = 'pop'