Complex sentence: The last painting before she abandoned painting and left New York in 1967, "Trumpet", marks a departure in that the single rectangle evolves into an overall grid of rectangles, here drawn in pencil over uneven washes of gray translucent paint.
Split into simpler sentences: The last painting before she abandoned her career, and left New York in 1967, "Trumpet", marks a departure in that the single rectangle evolves into an overall grid of rectangles. In this painting the rectangles are drawn in pencil over uneven washes of gray translucent paint.