CREATE TABLE table_31721 ("Frequency" CLOB, "Call sign" CLOB, "Branding" CLOB, "Format" CLOB, "Owner" CLOB)

What is the branding frequency of cbc radio 2?
SELECT "Frequency" FROM table_31721 WHERE "Branding" = 'cbc radio 2'
SELECT "Frequency" FROM "table_31721" WHERE "Branding" = 'cbc radio 2'