what is the average salary of Boston Red Stockings?
select avg ( t1.salary ) from salary as t1 join team as t2 on t1.team_id = t2.team_id_br where t2.name = 'Boston red Stockings'
what is the league id of Boston Red Stocking?
select league_id from team where name = 'Boston red Stockings'
yes
select year,rank from team where name = 'Boston red Stockings'