กี่ปีที่มี Drivers ของ ben hanley และ Flaps มีค่าน้อยกว่า 0?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many years have Drivers of ben hanley, and Flaps smaller than 0?It is not neccessary to use all the tables.
 table_52731:  "Year" [ real]  "Drivers" [ text]  "Races" [ real]  "Wins" [ real]  "Poles" [ real]  "FLaps" [ real]  "Points" [ real]  "D.C." [ text]  "T.C." [ text] 
SELECT COUNT("Year") FROM table_52731 WHERE "Drivers" = 'ben hanley' AND "FLaps" < '0'