user: Question: How many starts are associated with an oldsmobile engine, 21 finishes and before 2001?
Columns: ['Year', 'Chassis', 'Engine', 'Start', 'Finish', 'Team']
Types: ['real', 'text', 'text', 'real', 'real', 'text']
Sample row: [1993.0, 'Lola', 'Ford-Cosworth', 25.0, 27.0, 'Foyt']
SQL:

assistant: SELECT SUM("Start") FROM "Table" WHERE "Engine" = 'oldsmobile' AND "Finish" = 21.0 AND "Year" < 2001.0;