user: Question: What is the sum of season when the venue was Donington Park, and Brazil came in second?
Columns: ['Season', 'Venue', 'Teams', 'Drivers', 'Champion', 'Second', 'Third']
Types: ['real', 'text', 'real', 'real', 'text', 'text', 'text']
Sample row: [1990.0, 'Circuit de Spa-Francorchamps', 17.0, 34.0, 'Portugal ( Pedro Lamy , Diogo Castro Santos )', 'Brazil', 'Sweden']
SQL:

assistant: SELECT SUM("Season") FROM "Table" WHERE "Venue" = 'Donington Park' AND "Second" = 'Brazil';