user: Question: How many wins have a Series of Formula Nippon, and a Position of 8th?
Columns: ['Season', 'Series', 'Races', 'Wins', 'Position']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1989.0, 'Spanish Formula Fiat', '7', '2', '1st']
SQL:

assistant: SELECT SUM("Wins") FROM "Table" WHERE "Series" = 'Formula Nippon' AND "Position" = '8th';