Complex sentence: In 2002, President Heydar Aliyev issued a decree establishing Azerbaijani as the sole language of government--shop signs, stationery, and printing in Russian were replaced with Azerbaijani.
Split into simpler sentences: In 2002, President Heydar Aliyev issued a decree establishing Azerbaijani as the sole language of government. Additionally, shop signs, stationery, and printing in Russian were replaced with Azerbaijani.