user: Question: What is the sum of laps for karl muggeridge on a grid less than 16?
Columns: ['Rider', 'Bike', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Noriyuki Haga', 'Yamaha YZF-R1', 23.0, '38:33.762', 4.0]
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Rider" = 'karl muggeridge' AND "Grid" < 16.0;