Complex sentence: Ervand "Kochar" Kocharyan also known as Yervand Kochar (1899--1979) was a prominent sculptor and modern artist of the twentieth century and a founder of Painting in Space art movement.
Split into simpler sentences: Ervand "Kochar" Kocharyan also known as Yervand Kochar (1899--1979) was a prominent sculptor and modern artist of the twentieth century. He was a founder of Painting in Space art movement.