แสดงรายชื่อนักแสดงที่เคยแสดงละครเพลงชื่อ “The Phantom of the Opera”
Show names of actors that have appeared in musical with name "The Phantom of the Opera".
df_actor = pd.DataFrame(columns = ['Name', 'Musical_ID']); df_musical = pd.DataFrame(columns = ['Musical_ID', 'Name'])
df_actor[df_actor['Musical_ID'].isin(df_musical[df_musical['Name'] == 'The Phantom of the Opera']['Musical_ID'])]['Name']