Complex sentence: Constantin Meunier (12 April 1831--4 April 1905) was a Belgian painter and sculptor whose important contribution to modern art is the introduction of the image of the industrial worker, docker and miner, as an icon of modernity.
Split into simpler sentences: Constantin Meunier (12 April 1831--4 April 1905) was a Belgian painter and sculptor. He made an important contribution to the development of modern art by elevating the image of the industrial worker, docker and miner to an icon of modernity.