user: Question: How many years has an engine of audi 3.6l turbo v8 and 1st as the rank with an audi r8r as the chassis?
Columns: ['Year', 'Entrant', 'Class', 'Chassis', 'Engine', 'Rank', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1999.0, 'Champion Racing', 'LMP', 'Porsche 911 GT1 Evo', 'Porsche 3.2L Turbo Flat-6', '25th', '47']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Engine" = 'audi 3.6l turbo v8' AND "Rank" = '1st' AND "Chassis" = 'audi r8r';