user: Question: What is the total grid number that has 14 laps and a time of +29.483?
Columns: ['Team', 'Driver', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['New Zealand', 'Jonny Reid', 14.0, "19'25.408", 1.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Laps" = 14.0 AND "Time" = '+29.483';