หากผู้กำกับคือ Yannick Bisson จำนวนผู้ชมชาวแคนาดาคือเท่าใด
If the director is Yannick Bisson, what was the Canadian amount of viewers?
df = pd.DataFrame(columns=['canadian_viewers__millions_', 'directed_by'])
df[df['directed_by']=='Yannick Bisson']['canadian_viewers__millions_'].count()