How many games were played in park "Columbia Park" in 1907?
SELECT count(*) FROM home_game AS T1 JOIN park AS T2 ON T1.park_id  =  T2.park_id WHERE T1.year = 1907 AND T2.park_name = 'Columbia Park';
games played refers to count(*); in park 'Columbia Park' refers to T2.park_name = 'Columbia Park'; in 1907 refers to T1.year = 1907;