CREATE TABLE club (clubid VARCHAR(255), clubname VARCHAR(255)); CREATE TABLE member_of_club (position VARCHAR(255), clubid VARCHAR(255))
How many different roles are there in the club "Bootup Baltimore"?
    
SQL: SELECT COUNT(DISTINCT t2.position) FROM club AS t1 JOIN member_of_club AS t2 ON t1.clubid = t2.clubid WHERE t1.clubname = "Bootup Baltimore"