Complex sentence: The Izo-Narkompros (Изо-наркомпрос), or the section of visual arts (отдел изобразительных искусств) created in May 1918, consisted of two parts: the collegium (deliberative organ) and the section proper (executive organ).
Split into simpler sentences: The Izo-Narkompros (Изо-наркомпрос), or the section of visual arts (отдел изобразительных искусств, created in May 1918). It consisted of two parts: collegium (deliberative organ) and the section proper (executive organ).