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
Count the number of members in club "Bootup Baltimore" whose age is above 18.
create table Student (
         StuID        INTEGER PRIMARY KEY,
         LName        VARCHAR(12),
         Fname        VARCHAR(12),
         Age      INTEGER,
         Sex      VARCHAR(1),
         Major        INTEGER,
         Advisor      INTEGER,
         city_code    VARCHAR(3)
  );
create table Club (
       ClubID           INTEGER PRIMARY KEY,
       ClubName         VARCHAR(40),
       ClubDesc         VARCHAR(1024),
       ClubLocation VARCHAR(40)
);
create table Member_of_club (
       StuID            INTEGER,
       ClubID           INTEGER,
       Position     VARCHAR(40),
       FOREIGN KEY(StuID) REFERENCES Student(StuID),
       FOREIGN KEY(ClubID) REFERENCES Club(ClubID)
);
INSERT into Student values ( 1001, 'Smith', 'Linda', 18, 'F', 600, 1121,'BAL');
INSERT into Club values ( 1, 'Bootup Baltimore', 'Refurbish computers; teach kids and adults about computer basics.', 'AKW');
INSERT into Member_of_club values ( 1001, 1, 'President');
INSERT INTO Student VALUES [(1001, 'Smith', 'Linda', 18, 'F', 600, 1121, 'BAL'), (1002, 'Kim', 'Tracy', 19, 'F', 600, 7712, 'HKG')]
INSERT INTO Club VALUES [(1, 'Bootup Baltimore', 'Refurbish computers; teach kids and adults about computer basics.', 'AKW'), (2, 'Hopkins Student Enterprises', 'Venture capital fund for student business.', 'AKW')]
INSERT INTO Member_of_club VALUES [(1001, 1, 'President'), (1007, 4, 'Vice-President')]