user: Question: When is the earliest year associated with team norton and 0 wins?
Columns: ['Year', 'Class', 'Team', 'Points', 'Wins']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1949.0, '350cc', 'Norton', 0.0, 0.0]
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Team" = 'norton' AND "Wins" < 0.0;