Complex sentence: The painting depicts three young men grouped around a dinner table, playing music, and is painted in chiaroscuro, a Baroque painting technique making use of contrasts of light and dark shadows to achieve a sense of volume.
Split into simpler sentences: The painting depicts three young men grouped around a dinner table playing music. It is painted in chiaroscuro, a Baroque painting technique that made use of the contrast between light and dark shadows to achieve a sense of volume.