CREATE TABLE table_name_79 (transfer_window VARCHAR, country VARCHAR, transfer_fee VARCHAR)

What transfer window has bra as the country, with 3.4m as the transfer fee?
SELECT transfer_window FROM table_name_79 WHERE country = "bra" AND transfer_fee = "£3.4m"
SELECT "transfer_window" FROM "table_name_79" WHERE "bra" = "country" AND "transfer_fee" = "£3.4m"