CREATE TABLE table_20579 ("Platform" FLOAT, "Frequency  ( per hour ) " FLOAT, "Destination" TEXT, "Service Pattern" TEXT, "Operator" TEXT, "Line" TEXT)

Which line offers Fast to Norwood Junction?
SELECT "Line" FROM table_20579 WHERE "Service Pattern" = 'Fast to Norwood Junction'
SELECT "Line" FROM "table_20579" WHERE "Service Pattern" = 'Fast to Norwood Junction'