Leland W. Schubert ตั๋วเสรีเสรีนิยมมีใครอยู่ในตั๋วประชาธิปไตยบ้าง?
Leland W. Schubert, Free Libertarian ticket, had who listed on the Democratic ticket?
df = pd.DataFrame(columns=['democratic_ticket', 'free_libertarian_ticket'])
df.loc[df['free_libertarian_ticket'] == 'leland w. schubert', 'democratic_ticket']