List the names of the production companies that made at least 200 movies.
names of the production companies refers to company_name; at least 200 movies refers to COUNT(company_name) > = 200
SELECT T1.company_name FROM production_company AS T1 INNER JOIN movie_company AS T2 ON T1.company_id = T2.company_id GROUP BY T1.company_id HAVING COUNT(T2.movie_id) > 200