จำนวนนักแข่งที่เข้าเส้นชัยในรายการ Canadian Grand Prix ปี 2008 ก่อน Jarno Trulli คือเท่าใด ไม่จำเป็นต้องใช้ตารางทั้งหมด
what is the number of drivers that finished the 2008 canadian grand prix before jarno trulli ?It is not neccessary to use all the tables.
 table_203_52:  id [ number]  "pos" [ text]  "no" [ number]  "driver" [ text]  "constructor" [ text]  "laps" [ number]  "time/retired" [ text]  "grid" [ number]  "points" [ number] 
SELECT COUNT("driver") FROM table_203_52 WHERE "pos" < (SELECT "pos" FROM table_203_52 WHERE "driver" = 'jarno trulli')