user: Question: How many touchdowns did the Fullback score?
Columns: ['Player', 'Position', 'Starter', 'Touchdowns', 'Extra points', 'Field goals', 'Points']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Curtis', 'Left tackle', 'Yes', 1.0, 10.0, 0.0, 15.0]
SQL:

assistant: SELECT SUM("Touchdowns") FROM "Table" WHERE "Position" = 'Fullback';