ค้นหาชื่อสิ่งอำนวยความสะดวกของหอพักที่นักเรียนนามสกุล Smith อาศัยอยู่
Find the name of amenities of the dorm where the student with last name Smith is living in.
student = {'stuid': [], 'lname': []}; dorm = {'dormid': []}; lives_in = {'dormid': [], 'stuid': []}; has_amenity = {'dormid': [], 'amenid': []}; dorm_amenity = {'amenity_name': [], 'amenid': []}
dormid_with_smith = lives_in[lives_in['stuid'].isin(student[student['lname'] == 'Smith']['stuid'])]['dormid']; dorm_amenity[dorm_amenity['amenid'].isin(has_amenity[has_amenity['dormid'].isin(dormid_with_smith)]['amenid'])]['amenity_name']