user: Question: Result of 1st, and an Extra of 4 x 400 m relay is in what lowest year?
Columns: ['Year', 'Tournament', 'Venue', 'Result', 'Extra']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2006.0, 'Commonwealth Games', 'Melbourne , Australia', '1st', '100 m']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Result" = '1st' AND "Extra" = '4 x 400 m relay';