Complex sentence: Louise Upton Brumback (January 17,1867--February 22,1929) was an American artist and art activist known principally for her landscapes and marine scenes, her paintings won praise from the critics and art collectors of her time.
Split into simpler sentences: Louise Upton Brumback (January 17,1867--February 22,1929) was an American artist and art activist. Known principally for her landscapes and marine scenes, her paintings won praise from the critics and art collectors of her time.