CREATE TABLE table_47533 ("Frequency" TEXT, "Call sign" TEXT, "Location" TEXT, "Name / Format" TEXT, "Owner" TEXT)

Which Call sign has a Frequency of 102.5 fm?
SELECT "Call sign" FROM table_47533 WHERE "Frequency" = '102.5 fm'
SELECT "Call sign" FROM "table_47533" WHERE "Frequency" = '102.5 fm'