List down the IDs of the production companies that released the movies in 1916.
IDs of the production companies refers to company_id; movies in 1916 refers to release_date LIKE '1916%'
SELECT T2.company_id FROM movie AS T1 INNER JOIN movie_company AS T2 ON T1.movie_id = T2.movie_id WHERE CAST(STRFTIME('%Y', T1.release_date) AS INT) = 1916