แสดงที่อยู่อาศัยที่มีทั้งผู้เล่นเพศ "M" และผู้เล่นเพศ "F"
Show the residences that have both a player of gender "M" and a player of gender "F".
df_player = pd.DataFrame(columns=['Residence', 'gender'])
df_player[df_player['gender'] == 'M']['Residence'].intersection(df_player[df_player['gender'] == 'F']['Residence'])