Database: european_football_2
Question: For the players who had a 77 points overall rating on 2016/6/23, who was the oldest? Give the name of the player.
SQL: SELECT t1.player_name FROM Player AS t1 INNER JOIN Player_Attributes AS t2 ON t1.player_api_id = t2.player_api_id WHERE SUBSTR(t2.`date`, 1, 10) = '2016-06-23' AND t2.overall_rating = 77 ORDER BY t1.birthday ASC LIMIT 1