Complex sentence: Otgonbayar Ershuu is arguably one of the most well-known Mongolian modern artists in the Western world, he was portrayed in the film "ZURAG" by Tobias Wulff.
Split into simpler sentences: Otgonbayar Ershuu is arguably one of the most well-known Mongolian modern artists in the Western world. He was portrayed in the film "ZURAG" by Tobias Wulff.