ค้นหาบทความที่มี "Olin Shivers" เป็นผู้เขียน
Find the papers which have "Olin Shivers" as an author.
authorship = pd.DataFrame(columns=['authid', 'paperid']); papers = pd.DataFrame(columns=['title', 'paperid']); authors = pd.DataFrame(columns=['authid', 'fname', 'lname'])
papers.loc[papers['paperid'].isin(authorship.loc[authors[(authors['fname'] == 'Olin') & (authors['lname'] == 'Shivers')]['authid'], 'paperid']), 'title']