Question: Which American film, Dragonslayer or Swiss Family Robinson, was shot outside London?

full_context: Document 1: The Swiss Family Robinson (1975 TV series): The Swiss Family Robinson is an American action and adventure series that was broadcast during the 1975–76 TV season. The two-hour pilot for the series was first shown on April 15, 1975. Based upon the novel "The Swiss Family Robinson", the pilot and its 20 subsequent episodes of the series were produced by Irwin Allen, who had earlier produced a futuristic adaptation of the same novel in the TV series "Lost in Space".
Document 2: The Flight of Dragons: The Flight of Dragons is a 1982 animated fantasy film produced by Jules Bass and Arthur Rankin, Jr. and loosely combining the speculative natural history book of the same name (1979) by Peter Dickinson with the novel "The Dragon and the George" (1976) by Gordon R. Dickson. The film centers upon a quest undertaken to stop an evil wizard who plans to rule the world by dark magic. A major theme within the story is the question of whether science and magic can co-exist. This is told mostly through the experience of character Peter Dickinson, drawn from the 20th century into the magical realm.
Document 3: Dragonslayer: Dragonslayer is a 1981 American fantasy film directed by Matthew Robbins, from a screenplay he co-wrote with Hal Barwood. It stars Peter MacNicol, Ralph Richardson, John Hallam and Caitlin Clarke. The story, set in a fictional medieval kingdom, follows a young wizard who experiences danger and opposition as he attempts to defeat a dragon.
Document 4: Pete's Dragon (2016 film): Pete's Dragon is a 2016 American fantasy comedy-drama adventure film directed by David Lowery, written by Lowery and Toby Halbrooks, and produced by James Whitaker. The film is a reboot of the 1977 musical film of the same name written by Malcolm Marmorstein. The film stars Bryce Dallas Howard, Oakes Fegley, Wes Bentley, Karl Urban, Oona Laurence, and Robert Redford. The film tells the story of an orphaned feral boy who befriends a dragon in the Pacific Northwest, and the ensuing repercussions of their discovery by the town's local residents.
Document 5: Dark Kingdom: The Dragon King: Dark Kingdom: The Dragon King (also known as "Ring of the Nibelungs", "Die Nibelungen"," Curse of the Ring" and "Sword of Xanten") is a 2004 German television film directed by Uli Edel and starring Benno Fürmann, Alicia Witt, Kristanna Loken and Max von Sydow. The film is based on the Norse mythology story "Völsungasaga" and the German epic poem "Nibelungenlied", which tells the mythological story of Siegfried the Dragon-Slayer. Richard Wagner's music dramas "Siegfried" and "Götterdämmerung" are based on the same material. "Dark Kingdom: The Dragon King" was written by the husband and wife team of Diane Duane and Peter Morwood and is a Tandem Communications production. It was filmed entirely in South Africa.
Document 6: The Swiss Family Robinson: The Swiss Family Robinson (German: "Der Schweizerische Robinson") is a novel by Johann David Wyss, first published in 1812, about a Swiss family shipwrecked in the East Indies en route to Port Jackson, Australia.
Document 7: Dragonheart: Dragonheart is a 1996 British-American fantasy action-adventure film directed by Rob Cohen. It stars Dennis Quaid, David Thewlis, Pete Postlethwaite, Dina Meyer, and the voice of Sean Connery. It was nominated for the Academy Award for Best Visual Effects and various other awards in 1996 and 1997.
Document 8: Willow (film): Willow is a 1988 British-American high fantasy film directed by Ron Howard, produced and with a story by George Lucas, and starring Warwick Davis, Val Kilmer, Joanne Whalley, Jean Marsh, and Billy Barty. Davis plays the eponymous lead character and hero: a reluctant farmer who plays a critical role in protecting a special baby from a tyrannical queen who vows to destroy her and take over the world in a high fantasy setting.
Document 9: Swiss Family Robinson (1974 TV series): Swiss Family Robinson is a 1974–1975 Canadian television drama series, based on Johann David Wyss' novel "The Swiss Family Robinson".
Document 10: Beverly Hills Family Robinson: Beverly Hills Family Robinson is a 1997 American Walt Disney television film based on the novel "Swiss Family Robinson" by Johann David Wyss. The film features Dyan Cannon, Martin Mull, Sarah Michelle Gellar and Ryan O'Donohue as the main cast and was aired on ABC.
Document 11: Swiss Family Robinson (1940 film): Swiss Family Robinson is a 1940 American film released by RKO Radio Pictures and directed by Edward Ludwig. It is based on the novel "The Swiss Family Robinson" by Johann David Wyss and is the first feature-length film version of the story.
Document 12: Swiss Family Robinson (1960 film): Swiss Family Robinson is a 1960 American Adventure film starring John Mills, Dorothy McGuire, James MacArthur, Janet Munro, Tommy Kirk and Kevin Corcoran in a tale of a shipwrecked family building an island home, loosely based on the 1812 novel "Der Schweizerische Robinson" (literally, "The Swiss Robinson") by Johann David Wyss. The film was directed by Ken Annakin and shot in Tobago and Pinewood Studios outside London. It was the second feature film version of the story (the first film version was released by RKO in 1940) and was a commercial success.
Document 13: Eragon (film): Eragon is a 2006 British-American action-fantasy film directed by Stefen Fangmeier (in his directorial debut) and written by Peter Buchman, based on the novel of the same name by Christopher Paolini. The film stars Ed Speleers in the title role as well as Jeremy Irons, Sienna Guillory, Robert Carlyle, Djimon Hounsou, Garrett Hedlund, Joss Stone and John Malkovich, with Rachel Weisz as the voice of Saphira the dragon.
Document 14: Clash of the Titans (1981 film): Clash of the Titans is a 1981 British-American heroic fantasy adventure film directed by Desmond Davis and written by Beverley Cross which retells the Greek mythological story of Perseus. It stars Harry Hamlin, Judi Bowker, Burgess Meredith, Maggie Smith and Laurence Olivier. The film features the final work of stop motion visual effects artist Ray Harryhausen. It was released on June 12, 1981 and grossed $41 million at the North American box office, which made it the 11th highest-grossing film of the year. A novelization of the film by Alan Dean Foster was published in 1981.
Document 15: The Adventures of Swiss Family Robinson: The Adventures of Swiss Family Robinson is a 1998 family adventure series that originally aired on the PAX network (now Ion Television). Based on the 1812 novel "The Swiss Family Robinson", it follows the adventures of nine survivors of a shipwreck as they attempt to adapt to life on a deserted island. It lasted for one season.
ground_truth: Swiss Family Robinson