List the names and birthdays of the top five players in terms of potential.
SELECT DISTINCT T1.player_name ,  T1.birthday FROM Player AS T1 JOIN Player_Attributes AS T2 ON T1.player_api_id  =  T2.player_api_id ORDER BY potential DESC LIMIT 5
top five players in terms of potential refers to ORDER BY potential DESC LIMIT 5; names refers to player_name; birthdays refers to birthday;