user: Question: How many championships did the team or teams established in 1976 win?
Columns: ['Club', 'Sport', 'League', 'Venue', 'Established', 'Championships']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Seattle Mariners', 'Baseball', 'MLB', 'Safeco Field', 1977.0, 0.0]
SQL:

assistant: SELECT SUM("Championships") FROM "Table" WHERE "Established" = 1976.0;