Question: In addition to the Honorary President of the Institute for Jewish Policy Research, who else backs Viagogo?

full_context: Document 1: Gerald Rosenfeld: Gerald Rosenfeld is an American businessman, academic, and investment banker. He is well known as the former Head of Investment Banking of Lazard and as the former CEO of Rothschild North-America from 2000 to 2007. He is currently an Adjunct Professor of Finance at New York University Stern School of Business, teaching in their Executive Education Open Enrollment program, Integrated Law and Business Financial Risk Management. Until February 2011, Rosenfeld continued to work at Rothschild in the capacity of senior advisor. In 2011, he returned to Lazard as a senior executive.
Document 2: Online ticket brokering: Online ticket brokering is the resale of tickets through a web-based ticket brokering service. Prices on ticket brokering websites are determined by demand, availability, and the ticket reseller. Tickets sold through an online ticket brokering service may or may not be authorized by the official seller. Generally, the majority of trading on ticket brokering websites concerns itself with tickets to live entertainment events whereby the primary officially licensed seller's supply has been exhausted and the event has been declared "sold-out". This "sold-out" status increases the ticket's potential market value. Critics of the industry compare the resale of tickets online to ‘ticket touting’, ‘scalping’ or a variety of other terms for the unofficial sale of tickets directly outside the venue of an event.
Document 3: Viagogo: Viagogo is an online ticket marketplace for ticket resale (also called "scalping" or "touting"). The company, which was founded in London in 2006, has a network of more than 60 global websites with customers in 160 countries. Viagogo is backed by the venture capital investment firm Index Ventures as well as Brent Hoberman, the co-founder and former CEO of Lastminute.com and Lord Jacob Rothschild via his family interests. They have faced criticism for inflating ticket prices.
Document 4: Mehraj Mattoo: Mehraj Mattoo (महराज मट्टू ) is a British investment banker, economist and author; currently a Senior Fellow at Harvard University. He is the Co-founder and CEO of Commonwealth Asset Management. According to the UK and Cayman Islands company records, Commonwealth Asset Management is majority owned by NR Investments, the investment vehicle of the Rothschild Family. Before co-founding Commonwealth, Dr. Mattoo was Global Head of Asset Management at Commerzbank AG, leading one of the largest hedge fund and private equity groups globally (Investhedge 2009; The Billion Dollar Club). Prior to Commerzbank, Dr. Mattoo was the Managing Director of Dresdner Kleinwort Wasserstein, the investment banking arm of Dresdner Bank AG, the second largest bank in Germany. In the mid-1990s, Dr. Mattoo co-founded the first fund derivatives group in the City at BNP Paribas, the largest French/global bank by assets. He is widely credited for pioneering the use of structured products on alternative investments, especially hedge funds, that helped attract institutional assets to the hedge fund industry and contributed to its explosive growth over the following decade. In the early 1990s, Dr. Mattoo established and led the Structured Products business at NatWest Markets, the investment banking arm of Britain's largest bank, National Westminster Bank, now part of RBS Group and led an educational effort aimed at promoting responsible use of derivatives by corporations and institutional investors.
Document 5: Guy de Rothschild: Baron Guy Édouard Alphonse Paul de Rothschild (] ; 21 May 1909 – 12 June 2007) was a French banker and member of the Rothschild family. He owned the bank Rothschild Frères from 1967 to 1979, when it was nationalized by the French government, and maintained possessions in other French and foreign companies including Imerys. He was named to the International Best Dressed List Hall of Fame in 1985.
Document 6: Lastminute.com: lastminute.com is an online travel and leisure retailer. The company was founded by Martha Lane Fox and Brent Hoberman in 1998 and was a part of the UK internet boom of the late 1990s, part of the dot com bubble and trading on the London Stock Exchange under the symbol 'LMC'.
Document 7: Institute for Jewish Policy Research: The Institute for Jewish Policy Research (JPR), founded as the "Institute of Jewish Affairs", is a London-based research institute and think tank. It specializes in contemporary Jewish affairs, with a particular focus on Jews in Britain and across Europe. It is responsible for most of the recent data that exist on Jews in Britain, and its most significant recent reports include a study of Jews in Britain based on the 2001 UK Census data, an analysis of the attitudes of Jews in Britain towards Israel, an extensive study of child poverty and deprivation in the British Jewish community and the first National Jewish Student Survey. Its recent think-tank activities have included "Res Publica: The European Common Good," and "New Conceptions of Community." JPR also runs a public education programme, and has hosted lectures from a range of leading international thinkers including Chief Rabbi Lord Sacks, James Wolfenson, Professor Jonathan Sarna and Professor Zygmunt Bauman.
Document 8: Edmond de Rothschild Group: The Edmond de Rothschild Group is an international, family-owned and independent financial group, specialised in private banking, asset management, private equity, corporate finance and funds administration.
Document 9: Jacob Rothschild, 4th Baron Rothschild: Nathaniel Charles Jacob Rothschild, 4th Baron Rothschild, {'1': ", '2': ", '3': ", '4': "} (born 29 April 1936) is a British investment banker and a member of the prominent Rothschild banking family. He is also Honorary President of the Institute for Jewish Policy Research.
Document 10: Chris Tsakalakis: Chris Tsakalakis is a Greek-American technology executive. He is a former Entrepreneur in Residence at Benchmark Capital and a former president of StubHub and executive at eBay. A University of Pennsylvania graduate, he began his career in e-commerce in 1996 and joined eBay in 2003. He was president of StubHub from 2007 to 2014, as the company became the world's largest ticket marketplace and a leading sports and entertainment sponsor with more than 90 partnerships worldwide. Because of StubHub’s influence on the entertainment industry, Tsakalakis was named to the "Sports Business Journal" ’s 2011, 2012 and 2013 lists of the 50 most influential people in the sports business, the Billboard 2012 and 2013 Power 100 lists and the 2010 and 2011 "Huffington Post" Sports Game Changer lists. "Ticket News" cited him as "one of the most influential executives in the ticketing industry."
Document 11: Ticketmaster: Ticketmaster Entertainment, Inc. is an American ticket sales (primary ticket outlet) and distribution company based in West Hollywood, California, with operations in many countries around the world. In 2010 it merged with Live Nation (events promoter) to become Live Nation Entertainment. As a primary ticket outlet, most US ticket sales for US venues are fulfilled at Ticketmaster's two main fulfillment centers located in Charleston, West Virginia, and Pharr, Texas. Typically, Ticketmaster's clients (promoters) control their events, and Ticketmaster acts as an agent, selling the tickets that the clients make available to them.
Document 12: Simon Robey: Sir Simon Christopher Townsend Robey (born July 1960) is a British investment banker and supporter of cultural organisations.
Document 13: Charlotte de Rothschild: Charlotte de Rothschild (May 6, 1825 – July 20, 1899) was a French socialite, painter, and a member of the prominent Rothschild banking family of France. She was born in Paris, the daughter of Betty von Rothschild (1805–1868) and James Mayer de Rothschild (1792–1868). Charlotte de Rothschild was raised by very wealthy parents who were at the center of Parisian culture. They patronized a number of major figures in the arts community including Gioacchino Rossini, Frédéric Chopin, Honoré de Balzac, Eugène Delacroix, and Heinrich Heine. Chopin had become Charlotte's piano teacher in 1841, and as a tacit acknowledgment of the many years of support extended by Baron James and his wife Betty, dedicated to her (almost certainly as an 1843 wedding present) his celebrated Ballade No. 4 in F minor, Op. 52, and four years later another work, his Waltz in C-sharp minor, Op. 64, No. 2.
Document 14: CurrencyTransfer.com: CurrencyTransfer.com is a British company operating an online marketplace for businesses and private clients that acts as a foreign exchange aggregator. The company was founded in 2014 and has its headquarters in London. CurrencyTransfer.com was named "Startup of the Week" by Wired UK. It is the first company to provide an online marketplace and booking platform of multiple non-bank, FCA regulated foreign currency exchange suppliers.
Document 15: Brent Hoberman: Brent Shawzin Hoberman CBE (born 25 November 1968) is a British entrepreneur. Together with Martha Lane Fox, he founded Lastminute.com in 1998, an online travel and gift business. As CEO, Hoberman successively floated and later sold Lastminute.com Ltd to Sabre who purchased the company’s equity and bond debt for £577 million (including additional gross debt of approximately £79 million and estimated cash at bank in hand of approximately £72 million). In 2006, Hoberman handed over the CEO position to Ian McCaig, although he remained as chairman and chief strategic officer until 2007.
ground_truth: Brent Hoberman