สมาชิกของชมรมชื่อ "Hopkins Student Enterprises" คือใคร? แสดงนามสกุล.
Who are the members of the club named "Hopkins Student Enterprises"? Show the last name.
club = pd.DataFrame(columns=['clubid', 'clubname']); student = pd.DataFrame(columns=['lname', 'stuid']); member_of_club = pd.DataFrame(columns=['clubid', 'stuid'])
student[student['stuid'].isin(member_of_club[member_of_club['clubid'].isin(club[club['clubname'] == 'Hopkins Student Enterprises']['clubid'])]['stuid'])]['lname']