user: Question: How many laps were completed with a start of 33, and a finish of 18?
Columns: ['Year', 'Start', 'Qual', 'Rank', 'Finish', 'Laps']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['1949', '28', '126.139', '30', '18', 142.0]
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Start" = '33' AND "Finish" = '18';