Question: Who founded the famous chain of music-themed restaurants that opened its first establishment in the city Into the Gauntlet is in?

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. <SEP> 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. <SEP> They receive another lead, but this is stolen by Isabel Kabra via a pet monkey, who leaves them a coin with a fancy script K on it. "Into the Gauntlet" begins as Amy and Dan Cahill enter a London hotel tired and with no lead whatsoever. However, Dan, who has already memorized it, rewrites it. Amy looks all over the Internet to find out what it means, and she is about to shout out when Nellie realizes that the Kabra coin is a bug. She destroys it, along with three other bugs from each of the other three branches. Amy then tells them that the clue leads to William Shakespeare, so they go to a performance of Romeo and Juliet in The Globe Theatre. Once there, they confront the Starlings, who are back in the clue hunt after being sent to the hospital in an explosion back in "The Maze of Bones", and steal their lead, but they are trapped by Jonah Wizard, who was forced back into the clue hunt by Cora Wizard, the Holts, Alistair Oh, and the Kabras. Hamilton Holt steals the piece of paper with the lead, but Dan rips off the top and bottom, and he and Amy run away while everyone else is fighting over the rest of the lead. Their section of the lead says: "For this great man we sing was b here". The rest of the word that goes with the letter "b" was torn off, so they assume that it was supposed to be "born". <SEP> culver franchising system, inc., doing business as culver's, is a privately owned and operated casual fast food restaurant chain that operates primarily in the midwestern united states. culver's opened its first restaurant in 1984 in sauk city, wisconsin, and is currently headquartered in prairie du sac, wisconsin. as of 3 july 2018, the chain had 665 restaurants across the united states, and 18 coming soon in 10 states. <SEP> the modern hamburger was developed in the united states, but by the end of world war ii, around the middle of the 20th century, it began to spread to other countries as fast food became globalized. the main cause of this gradual globalization was the successes of the large restaurant chains. their desires to expand their businesses and increase their profits resulted in them creating franchises around the world. mcdonald's was among the very first of the burger chains to take the global establishment of its brand seriously, but it was not the only one. wimpy began operating in the united kingdom in 1954, 20 years before mcdonald's began operation in the country, and by 1970 it had expanded to over a thousand restaurants in 23 countries. on august 21, 1971, in zaandam, near amsterdam in the netherlands, ahold opened its first european franchise. in the 1970s, mcdonald's began to expand into europe and australia. in asia, japan saw the establishment of its own fast food chain in 1972: mos burger (モスバーガー, mosu bāgā), an abbreviation of ``mountain, ocean, sun '', which eventually became a direct competitor to mcdonald's. all of its products, however, were variations on the burger adapted to the asian world, including the teriyaki burger, takumi burger, and riceburger. in hong kong, aji ichiban competed with large chains before it spread quickly throughout asia. one of the first hamburger vending machines debuted in amsterdam in 1941 under the brand febo, its name derived from its original place of creation, the ferdinand bolstraat.