Tell me first names of the students living in the city with city code "LON"
select fname from student where city_code = "LON"
How about that of city with city code "BAL"
select fname from student where city_code = "BAL"
Tell me the names of all the clubs that have at least a member from the city with city code "BAL".
select distinct t1.clubname from club as t1 join member_of_club as t2 on t1.clubid = t2.clubid join student as t3 on t2.stuid = t3.stuid where t3.city_code = "BAL"