Which institutions were founded in 2003?
select institution from institution where founded = 2003
What are the corresponding building ids?
select building_id from institution where founded = 2003
What are the names of these buildings?
select t1.name from building as t1 join institution as t2 on t1.building_id = t2.building_id where t2.founded = 2003
Which building names are not in there?
select name from building except select t1.name from building as t1 join institution as t2 on t1.building_id = t2.building_id where t2.founded = 2003