Database: formula_1
Question: Which driver ranked the first in the Canadian Grand Prix in 2007? Please give his reference name.
SQL: SELECT T3.forename, T3.surname, T3.driverRef FROM races AS T1 INNER JOIN results AS T2 ON T2.raceId = T1.raceId INNER JOIN drivers AS T3 ON T3.driverId = T2.driverId WHERE T1.name = 'Canadian Grand Prix' AND T2.rank = 1 AND T1.year = 2007