สถาบันที่ "Matthias Blume" สังกัดอยู่ชื่ออะไร?
What is the name of the institution that "Matthias Blume" belongs to?
authorship = pd.DataFrame(columns=['authid', 'instid']); authors = pd.DataFrame(columns=['authid', 'fname', 'lname']); inst = pd.DataFrame(columns=['name', 'instid'])
inst.loc[inst['instid'].isin(authorship.loc[authors[(authors['fname'] == 'Matthias') & (authors['lname'] == 'Blume')]['authid'], 'instid']), 'name']