Task: Text to Code
Input (English): Step 1: For each row in country table, find the corresponding rows in match_season table.
Step 2: find Country_name of the results of step 1 whose Position equals Defender
Output (English): SELECT T1.Country_name FROM country AS T1 JOIN match_season AS T2 ON T1.Country_id = T2.Country WHERE T2.Position = "Defender"