user: Question: What is the lowest Year, when Co-Driver is warren luff, when Position is 7th, and when Laps is less than 161?
Columns: ['Year', 'Number', 'Team', 'Co-driver', 'Position', 'Laps']
Types: ['real', 'real', 'text', 'text', 'text', 'real']
Sample row: [1994.0, 18.0, 'Dick Johnson Racing', 'Allan Grice', '7th', 160.0]
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Co-driver" = 'warren luff' AND "Position" = '7th' AND "Laps" < 161.0;