Question: What is the type of the player who ended in 2013, had a Summer transfer window, and moved from Kalmar FF?
SQL: SELECT "Type" FROM "2-17637370-3" WHERE "Ends" = 2013.0 AND "Transfer window" = 'Summer' AND "Moving from" = 'Kalmar FF';

Question: Where did the player with a Transfer type, a Summer Transfer window, and ended before 2013 move from?
SQL: SELECT "Moving from" FROM "2-17637370-3" WHERE "Type" = 'Transfer' AND "Transfer window" = 'Summer' AND "Ends" < 2013.0;

Question: What is the transfer window for Larsson?
SQL: SELECT "Transfer window" FROM "2-17637370-3" WHERE "Name" = 'Larsson';

Question: What is the average end year of the player from SWE and a Summer transfer window?
SQL: SELECT AVG("Ends") FROM "2-17637370-3" WHERE "Nat." = 'SWE' AND "Transfer window" = 'Summer';