Question: What is the transfer fee for Helguera?
SQL: SELECT "Transfer fee" FROM "2-18515909-2" WHERE "Name" = 'Helguera';

Question: What was the transfer fee when the moving from was Celta de Vigo?
SQL: SELECT "Transfer fee" FROM "2-18515909-2" WHERE "Moving from" = 'Celta de Vigo';

Question: What was the transfer window with a moving from of Fenerbahçe?
SQL: SELECT "Transfer window" FROM "2-18515909-2" WHERE "Moving from" = 'Fenerbahçe';

Question: What nation had a moving from of Espanyol?
SQL: SELECT "Nat." FROM "2-18515909-2" WHERE "Moving from" = 'Espanyol';

Question: What was the transfer fee for the player with an ends of 2007?
SQL: SELECT "Transfer fee" FROM "2-18515909-2" WHERE "Ends" = 2007.0;