Calculate the average age of the persons who participated in the 1992 Summer Games.
DIVIDE(SUM(age), COUNT(person_id)) where games_name = '1992 Summer';
SELECT AVG(T2.age) 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 T1.games_name = '1992 Summer'