How many people, who were born in Canada, won an award in 1999?
born in Canada refers to birth_country = 'Canada'; in 1999 refers to year = 1999
SELECT COUNT(T1.person_id) FROM Person AS T1 INNER JOIN Award AS T2 ON T1.person_id = T2.person_id WHERE T2.year = 1999 AND T1.birth_country = 'Canada'