CREATE TABLE Movie(
	mID int primary key, 
	title text, 
	year int, 
	director text
)

CREATE TABLE Reviewer(
	rID int primary key, 
	name text)

CREATE TABLE Rating(
	rID int, 
	mID int, 
	stars int, 
	ratingDate date,
	FOREIGN KEY (mID) references Movie(mID),
	FOREIGN KEY (rID) references Reviewer(rID)
)
SELECT T2.name FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID  =  T2.rID GROUP BY T1.rID HAVING COUNT(*)  >=  3
Find the names of all reviewers who have contributed three or more ratings.