user: ### NOW ANSWER:
Question: Name the sum of Laps for lance reventlow with grid more than 16
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jack Brabham', 'Cooper - Climax', 36.0, '2:21:37.3', 1.0]
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Driver" = 'lance reventlow' AND "Grid" > 16.0;