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

How many members of 'Bootup Baltimore' are older than 18?
SELECT COUNT(*) 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" AND t3.age > 18
SELECT COUNT(*) FROM "club" AS "t1" JOIN "member_of_club" AS "t2" ON "t1"."clubid" = "t2"."clubid" JOIN "student" AS "t3" ON "t2"."stuid" = "t3"."stuid" AND "t3"."age" > 18 WHERE "Bootup Baltimore" = "t1"."clubname"