Question: Who founded the famous chain of music-themed restaurants which opened its first establishment in the city where the Prince and the Pauper takes place?

full_context: Document 1: London: London was instrumental in the development of punk music, with figures such as the Sex Pistols, The Clash, and Vivienne Westwood all based in the city. More recent artists to emerge from the London music scene include George Michael, Kate Bush, Seal, Siouxsie and the Banshees, Bush, the Spice Girls, Jamiroquai, Blur, The Prodigy, Gorillaz, Mumford & Sons, Coldplay, Amy Winehouse, Adele, Ed Sheeran and One Direction. London is also a centre for urban music. In particular the genres UK garage, drum and bass, dubstep and grime evolved in the city from the foreign genres of hip hop and reggae, alongside local drum and bass. Black music station BBC Radio 1Xtra was set up to support the rise of home-grown urban music both in London and in the rest of the UK.
Document 2: Mark Twain's (Burlesque) Autobiography and First Romance: Mark Twain's (Burlesque) Autobiography and First Romance is an 1871 book by American author Mark Twain. Published by Sheldon & Co. in 1871, the book consists of two short stories: "A Burlesque Autobiography", which first appeared in Twain's "Memoranda" contributions to "The Galaxy", and "First Romance", which originally appeared in "The Express" in 1870.
Document 3: London: London has numerous venues for rock and pop concerts, including the world's busiest arena the o2 arena and other large arenas such as Earls Court, Wembley Arena, as well as many mid-sized venues, such as Brixton Academy, the Hammersmith Apollo and the Shepherd's Bush Empire. Several music festivals, including the Wireless Festival, South West Four, Lovebox, and Hyde Park's British Summer Time are all held in London. The city is home to the first and original Hard Rock Cafe and the Abbey Road Studios where The Beatles recorded many of their hits. In the 1960s, 1970s and 1980s, musicians and groups like Elton John, Pink Floyd, David Bowie, Queen, The Kinks, The Rolling Stones, The Who, Eric Clapton, Led Zeppelin, The Small Faces, Iron Maiden, Fleetwood Mac, Elvis Costello, Cat Stevens, The Police, The Cure, Madness, The Jam, Dusty Springfield, Phil Collins, Rod Stewart and Sade, derived their sound from the streets and rhythms vibrating through London.
Document 4: Mexico City: The city is also a leading center of popular culture and music. There are a multitude of venues hosting Spanish and foreign-language performers. These include the 10,000-seat National Auditorium that regularly schedules the Spanish and English-language pop and rock artists, as well as many of the world's leading performing arts ensembles, the auditorium also broadcasts Grand Opera performances from New York's Metropolitan Opera on giant, high definition screens. In 2007 National Auditorium was selected world's best venue by multiple genre media.
Document 5: Hard Rock Cafe: The chain began to expand worldwide in 1982 with locations in (among others) Toronto, Los Angeles, San Francisco, Chicago, Paris, and Berlin. Hard Rock Cafe locations in the United States vary from smaller, more tourist driven markets (Biloxi, Pigeon Forge, Key West, etc.) to large metropolises (Houston, Philadelphia, New York City, Chicago, Boston, Washington, D.C., etc.). Hard Rock Cafe typically does not franchise cafe locations in the United States. All US cafes are corporate owned and operated, except for cafes in Tampa and Four Winds New Buffalo casino. However, in the transition of the Las Vegas Hard Rock Hotel property originally owned and then later sold to Rank by founder Peter Morton, Morton retained hotel naming rights west of the Mississippi. When Morton sold his Las Vegas Hard Rock Hotel to the Morgans Hotel Group, he also sold those naming rights, which then gave rise to two US franchised hotels (without cafes) in Albuquerque and Tulsa. The Albuquerque hotel no longer pays for the Hard Rock rights and reverted to its former name in June 2013. More hotels franchised from Morgan's are planned for Sioux City and Vancouver.
Document 6: The Prince and the Pauper: The Prince and the Pauper is a novel by American author Mark Twain. It was first published in 1881 in Canada, before its 1882 publication in the United States. The novel represents Twain's first attempt at historical fiction. Set in 1547, it tells the story of two young boys who are identical in appearance: Tom Canty, a pauper who lives with his abusive father in Offal Court off Pudding Lane in London, and Prince Edward, son of King Henry VIII.
Document 7: Mexico City: Other popular sites for pop-artist performances include the 3,000-seat Teatro Metropolitan, the 15,000-seat Palacio de los Deportes, and the larger 50,000-seat Foro Sol Stadium, where popular international artists perform on a regular basis. The Cirque du Soleil has held several seasons at the Carpa Santa Fe, in the Santa Fe district in the western part of the city. There are numerous venues for smaller musical ensembles and solo performers. These include the Hard Rock Live, Bataclán, Foro Scotiabank, Lunario, Circo Volador and Voilá Acoustique. Recent additions include the 20,000-seat Arena Ciudad de México, the 3,000-seat Pepsi Center World Trade Center, and the 2,500-seat Auditorio Blackberry.
Document 8: Isaac Tigrett: On June 14, 1971 he and Peter Morton started the first Hard Rock Café (HRC) restaurant in London's fashionable Mayfair district. The restaurant combined rock music, memorabilia related to rock 'n' roll and American cuisine.
Document 9: Isaac Tigrett: Isaac Burton Tigrett (born November 28, 1948, Jackson, Tennessee) is an American businessman, best known as the co-founder of Hard Rock Café and House of Blues.
Document 10: Adventures of Huckleberry Finn: Adventures of Huckleberry Finn (or, in more recent editions, The Adventures of Huckleberry Finn) is a novel by Mark Twain, first published in the United Kingdom in December 1884 and in the United States in February 1885. Commonly named among the Great American Novels, the work is among the first in major American literature to be written throughout in vernacular English, characterized by local color regionalism. It is told in the first person by Huckleberry ``Huck ''Finn, a friend of Tom Sawyer the narrator of two other Twain novels (Tom Sawyer Abroad and Tom Sawyer, Detective). It is a direct sequel to The Adventures of Tom Sawyer.
Document 11: Uncle Tom's Cabin: Uncle Tom's Cabin Uncle Tom's Cabin, Boston edition Author Harriet Beecher Stowe Original title Uncle Tom's Cabin; or, Life Among the Lowly Illustrator Hammatt Billings (1st edition) Country United States Language English Genre Novel Published Serialized in The National Era for ten months, beginning with the June 5, 1851 issue. Published as a book in two volumes on March 20, 1852, John P. Jewett and Company. Followed by A Key to Uncle Tom's Cabin (1853)
Document 12: Hard Rock Hotel & Casino Atlantic City: Construction of what was originally known as the Taj Mahal commenced in 1983 by Resorts International, owner of the neighboring Resorts Casino Hotel, with an estimated budget of $250 million. Resorts head James Crosby said it might be named the United States Hotel, in reference to the city's first major hotel.
Document 13: Southampton: Southampton has two large live music venues, the Mayflower Theatre (formerly the Gaumont Theatre) and the Guildhall. The Guildhall has seen concerts from a wide range of popular artists including Pink Floyd, David Bowie, Delirious?, Manic Street Preachers, The Killers, The Kaiser Chiefs, Amy Winehouse, Lostprophets, The Midnight Beast, Modestep, and All Time Low. It also hosts classical concerts presented by the Bournemouth Symphony Orchestra, City of Southampton Orchestra, Southampton Concert Orchestra, Southampton Philharmonic Choir and Southampton Choral Society.
Document 14: List of claimed first novels in English: Thomas Malory, Le Morte d'Arthur, (written c. 1470, published 1485) William Baldwin, Beware the Cat, (written 1553, published 1570, 1584) John Lyly, Euphues: The Anatomy of Wit (1578) and Euphues and his England (1580) Philip Sidney, The Countess of Pembroke's Arcadia (1581) Margaret Cavendish, The Blazing World (1666) John Bunyan, The Pilgrim's Progress (1678) Aphra Behn, Oroonoko (1688) Daniel Defoe, Robinson Crusoe (1719) Daniel Defoe, Moll Flanders (1722) Samuel Richardson, Pamela, or Virtue Rewarded (1740)
Document 15: Hard Rock Cafe: In 1990, The Rank Group, a London-based leisure company, acquired Mecca Leisure Group and continued expansion of the concept in its geographic territory. Rank went on to purchase Hard Rock America from Peter Morton as well as Hard Rock Canada from Nick Bitove. After the completion of these acquisitions, Rank gained worldwide control of the brand. In March 2007, the Seminole Tribe of Florida acquired Hard Rock Cafe International, Inc. and other related entities from Rank for US$965 million.In 2008, anonymous members of the wait staff criticized the business because of its practice of paying them less than half the official minimum wage in the UK, with the business allocating tips to staff to bring their salaries within the law. Most customers, it was argued, do not realize that they are subsidizing a low wage when they give the tip.
ground_truth: Peter Morton
sub_queries: where does the prince and the pauper take place Answer: London
What famous chain of music-themed restaurants opened its first establishment in London ? Answer: Hard Rock Cafe
Hard Rock Cafe >> founded by Answer: Peter Morton