Complex sentence: Katharine Russell (born 1923), now Lady Katharine Tait, is the only daughter of Bertrand Russell and the author of several essays about him and the book, "My Father, Bertrand Russell", published in 1975.
Split into simpler sentences: Katharine Russell (born 1923), now Lady Katharine Tait, is the only daughter of Bertrand Russell. She is the author of several essays about him and of the book, "My Father, Bertrand Russell", which was published in 1975.