ผู้เล่นคนไหนทำ 4 ทัชดาวน์ขณะเล่นกองหลังซ้าย?
Which player made 4 touchdowns while playing left halfback?
df = pd.DataFrame(columns=['player', 'touchdowns', 'position'])
df[(df['touchdowns'] == 4) & (df['position'] == 'Left halfback')]['player']