user: ### NOW ANSWER:
Question: What is the sum of the laps with a grid less than 28, Retirement time, and a Ducati 1098 F08 bikes?
Columns: ['Rider', 'Bike', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Noriyuki Haga', 'Yamaha YZF-R1', 18.0, '32:07.576', 3.0]
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Grid" < 28.0 AND "Time" = 'Retirement' AND "Bike" = 'Ducati 1098 F08';