Question: What was the name of the Olympic game that John Aalberg took part in when he was 31?
SQL: SELECT T1.games_name FROM games AS T1 INNER JOIN games_competitor AS T2 ON T1.id = T2.games_id INNER JOIN person AS T3 ON T2.person_id = T3.id WHERE T3.full_name = 'John Aalberg' AND T2.age = 31