user: Question: Which engine of bmw had the lowest points and chassis of march 792 that is newer than 1979?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1971.0, 'Eifelland Wohnwagenbau', 'Brabham BT30', 'Cosworth FVA', 0.0]
SQL:

assistant: SELECT MIN("Points") FROM "Table" WHERE "Engine" = 'bmw' AND "Chassis" = 'march 792' AND "Year" > 1979.0;