Question: What is the nationality of the narrator of A Quest for King Arthur?

full_context: Document 1: Ian McDiarmid: Ian McDiarmid ( ; born 11 August 1944) is an Olivier and Tony award-winning Scottish character actor and director. He has appeared in 47 films since 1976. Internationally, he is most famous for his role as Palpatine in the "Star Wars" film series.
Document 2: King Arthur: Legend of the Sword: King Arthur: Legend of the Sword is a 2017 epic fantasy film directed by Guy Ritchie and written by Ritchie, Joby Harold and Lionel Wigram, inspired by Arthurian legends. The film stars Charlie Hunnam as the eponymous character, with Jude Law, Àstrid Bergès-Frisbey, Djimon Hounsou, Aidan Gillen and Eric Bana in supporting roles.
Document 3: Ian McKellen, roles and awards: Ian McKellen (born 25 May 1939) is an English stage and screen actor. He is the recipient of six Laurence Olivier Awards, a Tony Award, a Golden Globe Award, two Academy Award nominations, four BAFTA nominations and five Emmy Award nominations. McKellen's work spans genres ranging from Shakespearean and modern theatre to popular fantasy and science fiction. His notable film roles include Gandalf in "The Lord of the Rings" and "The Hobbit" trilogies, Magneto in the "X-Men" films, Sir Leigh Teabing in "The Da Vinci Code" (2006), Sherlock Holmes in "Mr. Holmes" (2015) and Cogsworth in "Beauty and the Beast" (2017).
Document 4: Quest for King Arthur: Quest for King Arthur is a 2004 History Channel production introduced by Ioan Gruffudd and narrated by Patrick Stewart. The production delves into multiple historical figures who may have contributed to Arthurian legend as early as the third century and as late as the 9th. It cites as our primary source of the legend the writings of Sir Thomas Mallory. Other writings and sources, many used by Mallory, are cited for their specific contributions to the legend.
Document 5: Uther Pendragon: Uther Pendragon ( ; Welsh: "Uthyr Pendragon, Uthyr Bendragon" ) also known as King Uther, is a legendary king of sub-Roman Britain and the father of King Arthur. A few minor references to Uther appear in Old Welsh poems, but his biography was first written down by Geoffrey of Monmouth in his "Historia Regum Britanniae" ("History of the Kings of Britain"), and Geoffrey's account of the character was used in most later versions.
Document 6: King Arthur and King Cornwall: "King Arthur and King Cornwall" is an English ballad surviving in fragmentary form in the 17th-century Percy Folio manuscript. An Arthurian story, it was collected by Francis James Child as Child Ballad 30. Unlike other Child Ballads, but like the Arthurian "The Boy and the Mantle" and "The Marriage of Sir Gawain", it is not a folk ballad but a professional minstrel's song. It is notable for containing the Green Knight, a character known from the medieval poems "The Greene Knight" and the more famous "Sir Gawain and the Green Knight"; he appears as "Bredbeddle", the character's name in "The Greene Knight".
Document 7: Laurence Olivier: Laurence Kerr Olivier, Baron Olivier, {'1': ", '2': ", '3': ", '4': "} ( ; 22 May 1907 – 11 July 1989) was an English actor and director who, along with his contemporaries Ralph Richardson and John Gielgud, dominated the British stage of the mid-20th century. He also worked in films throughout his career, playing more than fifty cinema roles. Late in his career, he had considerable success in television roles.
Document 8: List of legendary kings of Britain: The following list of legendary kings of Britain derives predominantly from Geoffrey of Monmouth's circa 1136 work "Historia Regum Britanniae" ("the History of the Kings of Britain"). Geoffrey constructed a largely fictional history for the Britons (ancestors of the Welsh, the Cornish and the Bretons), partly based on the work of earlier medieval historians like Gildas, Nennius and Bede, partly from Welsh genealogies and saints' lives, partly from sources now lost and unidentifiable, and partly from his own imagination (see bibliography). Several of his kings are based on genuine historical figures, but appear in unhistorical narratives. A number of Middle Welsh versions of Geoffrey's "Historia" exist. All post-date Geoffrey's text, but may give us some insight into any native traditions Geoffrey may have drawn on.
Document 9: Ian McKellen: Sir Ian Murray McKellen, {'1': ", '2': ", '3': ", '4': "} (born 25 May 1939) is an English actor. He is the recipient of six Laurence Olivier Awards, a Tony Award, a Golden Globe Award, a Screen Actors Guild Award, a BIF Award, two Saturn Awards, four Drama Desk Awards, and two Critics' Choice Awards. He has also received two Oscar nominations, four BAFTA nominations and five Emmy Award nominations.
Document 10: Al Pacino: Alfredo James Pacino ( ; born April 25, 1940) is an American actor of stage and screen, filmmaker, and screenwriter. Pacino has had a career spanning over five decades, during which time he has received numerous accolades and honors both competitive and honorary, among them an Academy Award, two Tony Awards, two Primetime Emmy Awards, a British Academy Film Award, four Golden Globe Awards, the Lifetime Achievement Award from the American Film Institute, the Golden Globe Cecil B. DeMille Award, and the National Medal of Arts. He is also one of few performers to have won a competitive Oscar, an Emmy and a Tony Award for acting, dubbed the "Triple Crown of Acting".
Document 11: Arthur of the Britons: Arthur of the Britons is a British television show about the historical King Arthur. Produced by the HTV regional franchise, it consisted of two series, released between 1972 and 1973. ITV had already a reputation for entertaining historical TV shows that would display adventure and swordplay, such as "The Adventures of the Scarlet Pimpernel" (1956), "The Adventures of Robin Hood" (1955), "The Adventures of Sir Lancelot" (1956), "Ivanhoe" (1958) and "Sir Francis Drake" (1961). Like Richard Lionheart in the TV shows about Robin Hood and Ivanhoe this King Arthur shows greatness by making peace between the two foremost peoples in the England of his era. The looks of King Arthur and his brother-in-arms Kai resemble contemporary rockstars. "Arthur of the Britons" was broadcast repeatedly on numerous local ITV stations during the 1970s and 1980s.
Document 12: Patrick Stewart: Sir Patrick Stewart {'1': ", '2': ", '3': ", '4': "} (born 13 July 1940) is an English actor whose career has included roles on stage, television, and film in a career spanning almost six decades. He is a multiple time Olivier, Golden Globe, Emmy, Screen Actors Guild and Saturn Award nominee.
Document 13: Derek Jacobi: Sir Derek George Jacobi, ( ; born 22 October 1938) is an English actor and stage director.
Document 14: King Arthur (DC Comics): King Arthur (Arthur Pendragon) is a fictional character, a comic book King published by DC Comics. Arthur debuted in "New Comics" #3, (February 1936), and was created by Rafael Astarita. The character is based on the mythical ruler King Arthur whose earliest recorded appearances were in the "Annales Cambriae", the "Historia Brittonum", and the "Y Gododdin". The character of King Arthur was made popular by Geoffrey of Monmouth's second major work, the "Historia Regum Britanniae" (History of the Kings of Britain),
Document 15: Patrick Stewart, roles and awards: The following is a list of theatre, film, and television credits for English actor Patrick Stewart. He is known for his roles as Captain Jean-Luc Picard in the "Star Trek: The Next Generation" franchise and as Professor Charles Xavier in the "X-Men" film series. He has also been the voice of Avery Bullock on "American Dad!" since 2005. He won a Grammy Award in 1996 and is also a Tony, Emmy, and Golden Globe nominee.
ground_truth: English