What is the game name that was held in Beijing in 2008?
Beijing refers to city_name = 'Beijing'; in 2008 refers to games_year = '2008';
SELECT T3.games_name FROM games_city AS T1 INNER JOIN city AS T2 ON T1.city_id = T2.id INNER JOIN games AS T3 ON T1.games_id = T3.id WHERE T2.city_name = 'Beijing' AND T3.games_year = 2008