Complex sentence: Marguerite Radclyffe Hall (12 August 1880--7 October 1943) was an English poet and author, best known for the novel "The Well of Loneliness".
Split into simpler sentences: Marguerite Radclyffe Hall (12 August 1880--7 October 1943) was an English poet and author. She is best known for the novel "The Well of Loneliness".