ซีซั่นนี้มีคนกำกับตอนที่ 3 กี่คน?
How many people directed episode 3 in the season?
{'schema': {'directed_by': 'object', 'no_in_season': 'int64'}, 'data': {'directed_by': [], 'no_in_season': []}}
df[df['no_in_season'] == 3]['directed_by'].count()