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
How many members of club "Bootup Baltimore" are younger 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 where t1 . clubname = value and t3 . age < value
How many members of club `` Bootup Baltimore '' are younger than 18 ?