Please list the positions of the players who were born in Canada and have won the All-Rookie award.
born in Canada refers to birthCountry = 'Canada'; pos = 'LW' refers to left winger; pos = 'RW' refers to right winger; pos = 'C' refers to center; pos = 'G' refers to goalie; pos = 'D' refers to defenceman; pos = 'W' refers to winger; pos = 'F' refers to forward
SELECT DISTINCT T1.pos FROM Master AS T1 INNER JOIN AwardsPlayers AS T2 ON T1.playerID = T2.playerID WHERE T1.birthCountry = 'Canada' AND T2.award = 'All-Rookie'