Show the names of players and names of their coaches.
SELECT T3.Player_name ,  T2.coach_name FROM player_coach AS T1 JOIN coach AS T2 ON T1.Coach_ID  =  T2.Coach_ID JOIN player AS T3 ON T1.Player_ID  =  T3.Player_ID
names of players = Player_name; names of their coaches = coach_name; relationship between players and coaches is represented through a junction table player_coach which links player and coach via Player_ID and Coach_ID respectively;