Task: Text to Code
Input (English): Step 1: For each row in players table, find the corresponding rows in matches table.
Step 2: find the number of rows of each value of loser_id in the results of step 1.
Step 3: find first_name, country_code of step 1 results with largest value in the results of step 2
Output (English): SELECT T1.first_name , T1.country_code FROM players AS T1 JOIN matches AS T2 ON T1.player_id = T2.loser_id GROUP BY T2.loser_id ORDER BY Count ( * ) Desc LIMIT 1