ค้นหาเอกสารทั้งหมดที่เผยแพร่โดยสถาบัน "Google"
Find all the papers published by the institution "Google".
inst = pd.DataFrame(columns=['instid', 'name']); authorship = pd.DataFrame(columns=['paperid', 'instid']); papers = pd.DataFrame(columns=['title', 'paperid'])
papers.loc[papers['paperid'].isin(authorship.loc[inst[inst['name'] == 'Google']['instid'], 'paperid']), 'title']