Complex sentence: In 2003, Russian-Azerbaijani writers "Ray" and the Moscow branch of the Writers Union of Azerbaijan was established while in 2004-an association of writers and poets of the "Commonwealth literature" established.
Split into simpler sentences: In 2003, Russian-Azerbaijani writers "Ray" and the Moscow branch of the Writers Union of Azerbaijan was established. In 2004, an association of writers and poets of the "Commonwealth literature" established.