Question: What was the transfer fee for the player ending in 2011 and moving from Thrasyvoulos?
SQL: SELECT "Transfer fee" FROM "2-15956066-2" WHERE "Ends" = 2011.0 AND "Moving from" = 'Thrasyvoulos';

Question: What was the transfer fee for the player moving in the Winter window and ending in a year after 2010?
SQL: SELECT "Transfer fee" FROM "2-15956066-2" WHERE "Ends" > 2010.0 AND "Transfer window" = 'Winter';