Question: What is the birth date of the person Martin Blumenson wrote an authoritative biography of?
Context: General George Smith Patton Jr. (November 11, 1885 – December 21, 1945) was a senior officer of the United States Army who commanded the U.S. Seventh Army in the Mediterranean and European theaters of World War II, but is best known for his leadership of the U.S. Third Army in France and Germany following the Allied invasion of Normandy in June 1944. Theodor Schieffer (11 June 1910 in Bad Godesberg – 9 April 1992 in Bad Godesberg) was a German historian.  He was professor of medieval history at the University of Mainz, then at the University of Cologne, and since 1952 he was president of the Association for Middle Rhine Church History.  He is the author of "Winfrid-Bonifatius und die christliche Grundlegung Europas", the authoritative biography of Saint Boniface. Martin Blumenson (8 November 1918–15 April 2005) was an American military historian who served as a historical officer with the Third and Seventh Armies in World War II and later became a prolific author.  His works included an authoritative biography of General George S. Patton. Thomas Day Singleton (Birth date unknown – November 25, 1833) was a United States Representative from South Carolina.  He was born near Kingstree, South Carolina but his birth date is unknown. In Costa Rica, in recent years, a cédula de identidad, has been a credit card-sized plastic card.  On one side, it includes a photo of the person, a personal identification number, and the card's owner personal information (complete name, gender, birth date, and others), and the user's signature.  On the reverse, it may include additional information such as the date when the ID card was granted, expiration date of the ID card, and other such as their fingerprints, and all the owner's information in matrix code.  Every Costa Rican citizen must carry an ID card immediately after turning 18. Diana in Search of Herself: Portrait of a Troubled Princess is one of the books about Princess Diana that was written by best-selling author Sally Bedell Smith.  It was published by the Times Books in 1999.  The book is the first authoritative biography of the Princess. Jesse William Weik (25 November 1857 – August 18, 1930), was a collaborator with William Herndon in writing the first authoritative biography of Abraham Lincoln, published in 1889. Beverly Mayne Kienzle (born 1947) retired in 2015 as the John H. Morison Professor of the Practice in Latin and Romance Languages at the Harvard Divinity School, Harvard University.  She is a specialist in Christian Latin, Latin paleography, and medieval Christianity.  She has published over seventy articles and fifteen books, including five on Hildegard of Bingen.  Her latest book is an authoritative biography of her grandmother, Virginia Cary Hudson, author of the best-selling "O Ye Jigs and Juleps!" . Georges Perec: A Life in Words is an authoritative biography of Georges Perec by David Bellos, Professor of French and Comparative Literature and Director of the Program in Translation and Intercultural Communication at Princeton University, who also translated Perec's major novel "Life: A User's Manual" (1978) from French into English.  His prize-winning biography contains a full list of Perec's works.  Unfortunately the first edition (1993) published in Australia contained a rather unfortunate binding error.  About three-quarters of the way through, a whole section was reinserted into the book.  This made the rest of the book rather unreadable.  The second edition (1995) has hopefully corrected this. Judith Cladel, (March 25, 1873 – January 29, 1958) was a French playwright, novelist, biographer and journalist.  Born and lived in Paris, she was a member of the jury of the prix Femina from 1916 to 1958.  She began to write at a very young age, encouraged by her father, the novelist Léon Cladel.  Her first work was the play "Le Volant", performed at the Théâtre de l'Oeuvre in 1895 when she was 22 years old.  Léon Cladel died when Judith was 19 years old.  As her father's friend and her future lover, Edmond Picard predicted, Cladel was entrusted by her family with upkeeping his memory.  Judith Cladel is the author of two biographical works about the life and work of her father.  Her next biographies focused on the sculptor, Auguste Rodin.  Her biography "Rodin, sa vie glorieuse, sa vie inconnue" is her best known work and was considered the authoritative biography of the sculptor for over 50 years.  She played a key role in the founding of the Musée Rodin in 1916.
Answer: November 11, 1885