Question: The writer from whose work the 1953 film Knights of the Round Table was adapted died in what year?

Context paragraphs:
Thomas Malory: Sir Thomas Malory (c. 1415-18 – 14 March 1471) was an English writer, the author or compiler of "Le Morte d'Arthur".  Since the late nineteenth century, he has generally been identified as Sir Thomas Malory of Newbold Revel in Warwickshire, a knight, land-owner, and Member of Parliament.  Previously, it was suggested by antiquary John Leland and John Bale that he was Welsh (identifying "Malory" with "Maelor").

Pellinore: King Pellinore is the king of Listenoise or of "the Isles" (possibly Anglesey, or perhaps the medieval kingdom of the same name), according to the Arthurian legend.  Son of King Pellam and brother of Kings Pelles and Alain, he is most famous for his endless hunt of the Questing Beast, which he is tracking when King Arthur first meets him.  Pellinore beats King Arthur after three jousts and breaks the sword Arthur had withdrawn from the stone (in some versions this is Excalibur, though he gets another sword of that name from the Lady of the Lake soon after).  Merlin throws a spell of enchantment on Pellinore to save Arthur’s life.  Arthur praises Pellinore’s skill, and they soon become friends, with Arthur inviting him to join the Knights of the Round Table.  He has many legitimate and illegitimate children; his sons Tor, Aglovale, Lamorak, Dornar, and Percival all eventually join the Round Table as well, and his unnamed daughter (see Dindrane) becomes a servant of the Holy Grail and helps Percival, Galahad and Bors achieve the mystical objective.

Round Table (tournament): A Round Table was a festive event during the Middle Ages that involved jousting, feasting, and dancing in imitation of King Arthur's legendary court.  Named for Arthur's famed Round Table, the festivals generally involved jousts with blunted weapons, and often celebrated weddings or victories.  In some cases participants dressed in the costume of such well-known knights as Lancelot, Tristan, and Palamedes.  The first recorded instance of this activity was in 1223, when the Crusader lord of Beirut held one in Cyprus to celebrate the knighting of his eldest sons.

King Arthur (TV series): King Arthur & the Knights of the Round Table (円卓の騎士物語 燃えろアーサー , Entaku no Kishi Monogatari Moero Āsā , lit.  "Story of the Knights of the Round Table: Blazing Arthur") is an anime series based on the Arthurian legend.  Produced by Toei Animation, it consists of 30 half-hour episodes released between September 9, 1979 and March 3, 1980.  The series achieved more widespread popularity in its non-English translations.

Round Table: The Round Table is King Arthur's famed table in the Arthurian legend, around which he and his Knights congregate.  As its name suggests, it has no head, implying that everyone who sits there has equal status.  The table was first described in 1155 by Wace, who relied on previous depictions of Arthur's fabulous retinue.  The symbolism of the Round Table developed over time; by the close of the 12th century it had come to represent the chivalric order associated with Arthur's court, the Knights of the Round Table.

Society of Knights of the Round Table: The Honourable Society of Knights of the Round Table, also known as The Knights of the Round Table Club, is a British society which exists to perpetuate the name and fame of King Arthur and the ideals for which he stood.  It meets at Lansdowne House, Berkeley Square, home of the Lansdowne Club.

List of Arthurian characters: The Arthurian legend featured many characters, including the Knights of the Round Table and members of his family.  Their names often differed from version to version and from language to language.  The following is a list of them with descriptions.  (Note: The ' † ' symbol indicates a Knight of the Round Table.)

Round table (furniture): A round table is a table which has no "head" and no "sides", and therefore no one person sitting at it is given a privileged position and all are treated as equals.  The idea stems from the Arthurian legend about the Knights of the Round Table in Camelot.

Knights of the Round Table (film): Knights of the Round Table is a 1953 American historical Technicolor film made by MGM.  Directed by Richard Thorpe and produced by Pandro S. Berman, it was the first film in Cinemascope made by that studio.  The screenplay was by Talbot Jennings, and Noel Langley from Sir Thomas Malory's "Le Morte d'Arthur", first published in 1485 by William Caxton.

The Sword and the Circle: The Sword and the Circle, King Arthur and the Knights of the Round Table is a children's novel written by Rosemary Sutcliff and was first published in 1981.  The story is a retelling of the story of King Arthur and his Knights of the Round Table.  According to her own statements in the introduction, "The Sword and the Circle" follows the myths and folktales of King Arthur, crediting inspiration primarily from Sir Thomas Malory's "Le Morte d'Arthur"; other sources include Geoffrey of Monmouth's "Historia Regum Britanniae", English ballads, and Irish folktales.  She contrasts this telling of the King Arthur story with her previous novels, "The Lantern Bearers" and "Sword at Sunset", which were more an attempt to connect with a concrete historical figure behind the folktales.

Supporting paragraphs: Knights of the Round Table (film) Thomas Malory
Answer: 1471