CREATE TABLE member_of_club (clubid VARCHAR2, stuid VARCHAR2)
CREATE TABLE student (age NUMBER, stuid VARCHAR2)
CREATE TABLE club (clubid VARCHAR2, clubname VARCHAR2)

What is the average age of the members of the club 'Bootup Baltimore'?
SELECT AVG(t3.age) 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 t1.clubname = "Bootup Baltimore"
SELECT AVG("t3"."age") FROM "club" "t1" JOIN "member_of_club" "t2" ON "t1"."clubid" = "t2"."clubid" JOIN "student" "t3" ON "t2"."stuid" = "t3"."stuid" WHERE "Bootup Baltimore" = "t1"."clubname"