ฝูงชนชั้นนำคือใครเมื่อเอสเซนดอนเล่นไป?
What was the top crowd when essendon played away?
df = pd.DataFrame({'crowd': [1000, 2000], 'away_team': ['essendon', 'carlton']})
df.loc[df['away_team'] == 'essendon', 'crowd'].max()