Complex sentence: Since its official commencement, around 57 people had governed the Russian government, one of the country's highest organs, which is composed of ministries, such as Ministry of Foreign Affairs or Ministry of Culture.
Split into simpler sentences: Since its official commencement, around 57 people had governed the Russian government, one of the country's highest organs. The head of government consists of ministries, such as Ministry of Foreign Affairs or Ministry of Culture.