Complex sentence: She inspired some of her father's works, wrote her own biography of him that Twain later published as part of his autobiography, acted as a literary critic, and left him heartbroken when she died of spinal meningitis at age twenty-four.
Split into simpler sentences: She inspired some of her father's works, wrote her own biography of him that Twain later published as part of his autobiography, acted as a literary critic. Her father was heartbroken when she died of spinal meningitis at age twenty-four.