มีกี่เกมที่เล่นในเมืองแอตแลนตาในปี 2000
How many games were played in city Atlanta in 2000?
park = pd.DataFrame(columns=['park_id', 'city']); home_game = pd.DataFrame(columns=['park_id', 'year'])
home_game[(home_game['park_id'].isin(park[park['city'] == 'Atlanta']['park_id'])) & (home_game['year'] == '2000')].shape[0]