Database: european_football_2 (difficulty: simple)
Question: What is the overall rating of the football player Joaquin in year 2011?
SQL: SELECT t2.overall_rating FROM Player AS t1 INNER JOIN Player_Attributes AS t2 ON t1.player_api_id = t2.player_api_id WHERE t1.player_name = 'Joaquin' AND strftime('%Y', t2.date) = '2011'