user: Question: At which Conference was the Division in the East, and the Home Stadium named FedExField?
Columns: ['Conference', 'Division', 'Team', 'City', 'Home Stadium']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['American', 'East', 'Buffalo Bills', 'Orchard Park, New York', 'Ralph Wilson Stadium']
SQL:

assistant: SELECT "Conference" FROM "Table" WHERE "Division" = 'East' AND "Home Stadium" = 'FedExField';