CREATE TABLE table_6326 ("Year" FLOAT, "Chassis" TEXT, "Engine" TEXT, "Start" TEXT, "Finish" TEXT, "Team" TEXT)

What is the Engine with 3 as the start in the year of 2007?
SELECT "Engine" FROM table_6326 WHERE "Start" = '3' AND "Year" = '2007'
SELECT "Engine" FROM "table_6326" WHERE "Start" = '3' AND "Year" = '2007'