user: Question: What are the highest points that have a Mugen V8 engine and happened in 1991?
Columns: ['Year', 'Chassis', 'Engine', 'Tyres', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1989.0, 'Reynard 89D', 'Mugen V8', 'A', 17.0]
SQL:

assistant: SELECT MAX("Points") FROM "Table" WHERE "Engine" = 'Mugen V8' AND "Year" = 1991.0;