ดีวีดี Ben 10: Alien Force Volume 8 มีจำนวนตอนเท่าไร?
What the episode count for Ben 10: Alien Force Volume 8 on DVD?
df = pd.DataFrame({'episode_count': [], 'dvd_title': []})
df[df['dvd_title'] == 'ben 10: alien force volume 8']['episode_count'].max()