How many people have won at least 3 awards?
won refers to result = 'Winner'; at least 3 awards refers to count(result) > 3
SELECT COUNT(T1.person_id) FROM Person AS T1 INNER JOIN Award AS T2 ON T1.person_id = T2.person_id WHERE T2.result = 'Winner' GROUP BY T1.person_id HAVING COUNT(T2.award_id) >= 3