Give me the position of the member in the tennis club
SELECT t2.Position 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   =   "Tennis Club"
position of the member in the tennis club refers to joining tables: club with member_of_club and member_of_club with student, filtering by clubname = 'Tennis Club';