Complex sentence: Minnie's work is often compared with that of her sister-in-law Emily Kame Kngwarreye, both artists being from the Sandover, and both being prolific and highly-praised artists who came to acrylic painting late in life.
Split into simpler sentences: Minnie's work is often compared with that of her sister-in-law Emily Kame Kngwarreye. They both became prolific and highly praised artists who came to acrylic painting late in life.