Who is the oldest player that participated in OHL league in the 1997 - 2000 season?
oldest player refers to MIN(birthdate); OHL league refers to LEAGUE = 'OHL'; 1997-2000 season refers to SEASON = '1997-2000';
SELECT T1.PlayerName FROM PlayerInfo AS T1 INNER JOIN SeasonStatus AS T2 ON T1.ELITEID = T2.ELITEID WHERE T2.LEAGUE = 'OHL' AND T2.SEASON = '1999-2000' ORDER BY T1.birthdate LIMIT 1