Find the names of all reviewers who have contributed three or more ratings.
SELECT T2.name FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID  =  T2.rID GROUP BY T1.rID HAVING COUNT(*)  >=  3
SELECT T2.name FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID  =  T2.rID GROUP BY T1.rID HAVING COUNT(*)  >=  3
[{'name': 'Brittany Harris'}, {'name': 'Chris Jackson'}]