Complex sentence: Alice Mary Longfellow (September 22,1850-December 7,1928) was the eldest surviving daughter of the famous American poet Henry Wadsworth Longfellow, best known as "grave Alice" for her description in her father's poem "The Children's Hour".
Split into simpler sentences: Alice Mary Longfellow (September 22,1850-December 7,1928) was the eldest surviving daughter of the famous American poet Henry Wadsworth Longfellow. She is best known as "grave Alice" for her description in her father's poem "The Children's Hour".