CREATE TABLE table_49707 ("Exit Date" TEXT, "Pos." TEXT, "Player" TEXT, "To club" TEXT, "Transfer fee" TEXT)

When was the exit date KiatPrawut Saiwaeo who had a transfer fee of released?
SELECT "Exit Date" FROM table_49707 WHERE "Transfer fee" = 'released' AND "Player" = 'kiatprawut saiwaeo'
SELECT "Exit Date" FROM "table_49707" WHERE "Player" = 'kiatprawut saiwaeo' AND "Transfer fee" = 'released'