Question: Where is the headquarters of the conglomerate managed by Essence Global known as NBCUni?

full_context: Document 1: NBC: The National Broadcasting Company (NBC) is an American English language commercial broadcast television network that is a flagship property of NBCUniversal, a subsidiary of Comcast. The network is headquartered at 30 Rockefeller Plaza in New York City, with additional major offices near Los Angeles (at 10 Universal City Plaza), and Chicago (at the NBC Tower). The network is part of the Big Three television networks. NBC is sometimes referred to as the "Peacock Network", in reference to its stylized peacock logo, introduced in 1956 to promote the company's innovations in early color broadcasting. It became the network's official emblem in 1979.
Document 2: Omnicom Group: Omnicom Group, Inc. is an American global marketing and corporate communications holding company, headquartered in New York City.
Document 3: News Corporation: The original News Corporation or News Corp. was an American multinational mass media corporation headquartered in New York City. It was the world's fourth-largest media group in 2014 in terms of revenue. Board members include prominent former Spanish prime minister José María Aznar.
Document 4: CNBC: CNBC is an American basic cable, internet and satellite business news television channel that is owned by NBCUniversal News Group, a division of NBCUniversal, owned by Comcast. Headquartered in Englewood Cliffs, New Jersey, the network primarily carries business day coverage of U.S. and international financial markets; following the end of the business day and on non-trading days, CNBC primarily carries financial and business-themed documentaries and reality shows.
Document 5: NBCUniversal: NBCUniversal, sometimes referred to as NBCU or NBCUni and formerly written as NBC Universal, is an American multinational media conglomerate. Headquartered in Rockefeller Plaza's Comcast Building (formerly the GE Building) in Midtown Manhattan, New York City, the company is one of two successor companies to MCA Inc. (Music Corporation of America), the other being Vivendi through its subsidiary Universal Music Group.
Document 6: Bertelsmann Building: The former Bertelsmann Building, now known as 1540 Broadway, is a 44-story, 733 foot (223 m) office tower in Times Square in Manhattan, New York City, standing at West 45th Street. The building was the North American headquarters of media conglomerate Bertelsmann from 1992 until the company vacated and sold the property, of which they occupied all office-use floors, in 2004. The building housed US satellites of central functions such as Corporate Development, Corporate Communications and the Office of the Chairman and CEO, as well as serving as worldwide headquarters for the Bertelsmann Music Group and Bertelsmann Book Group (what has later taken on the umbrella brand name Random House). Today's office tenants include Viacom, China Central Television, KEMP Technologies, Adobe and Pillsbury Winthrop Shaw Pittman. The building retained the Bertelsmann name and signage facing Broadway until its eventual removal in late 2013.
Document 7: Expert Global Solutions: Founded in 2012, Expert Global Solutions, Inc., ("EGS", formerly NCO Group), based in Plano, Texas, is the world's largest privately owned Business Process Outsourcing company with more than 100 locations globally and more than 40,000 associates. It is a holding company for NCO and APAC Customer Services, Inc. (APAC), providers of global business process outsourcing services. NCO provides accounts receivable management (ARM) services, and APAC provides customer relationship management (CRM) services. EGS has over 100 locations, with more than 42,000 employees. EGS is owned by One Equity Partners (OEP), the private investment arm of JP Morgan Chase & Co.
Document 8: Essence Global: Essence is a global digital-first media agency. The agency has 13 offices in 7 countries and a staff of approximately 1100. Essence manages over $3B in media spend globally, with clients such as Google, The Financial Times, Target, NBCUniversal, BP, FrieslandCampina and Tesco Mobile. In 2015 Essence became majority owned by WPP, and a part of GroupM, the WPP media investment management operation. Essence specializes in strategy, digital marketing, digital creative, media planning and buying, mobile advertising and analytics.
Document 9: Matomy Media: Matomy Media Group Ltd. (, ) a publicly traded company since July 2014, is an international digital marketing company providing advertisers, agencies, publishers and application developers with a wide range of performance-based and programmatic advertising solutions. The company was incorporated in 2006 and launched in 2007 as AdsMarket. Clients include HSBC, American Express and AT&T. The company was founded by current Matomy CEO Ofer Druker, Adi Orzel and Kfir Moyal, and is headquartered in Tel Aviv, Israel, with additional offices in Madrid, Mexico City, Berlin, Munich, London, Denver, Fort Lauderdale, Fla, New York City and San Francisco. The company employs more than 400 people, has a client base of 2,000-plus active customers and works with more than 26,000 registered media sources in 100 countries. The company has been a part of the IAB QAG Certified Network since 2011.
Document 10: Digitas Health: Digitas Health is an interactive marketing agency catering exclusively to healthcare and pharmaceutical companies. The company was founded in 1990 as Medical Broadcasting Corporation and became a unit of Digitas in 2006 as Digitas Health. In 2011, the agency became independent of Digitas, and integrated into the Publicis Healthcare Communications Group (PHCG), the world’s largest healthcare communications network. PHCG is part of Paris-based Publicis Groupe the world’s third largest communications group, second largest media counsel and buying group, and a global leader in digital and healthcare communications.
Document 11: Comcast: Comcast Corporation (formerly registered as Comcast Holdings) is an American global telecommunications conglomerate that is the largest broadcasting and cable television company in the world by revenue. It is the second-largest pay-TV company after AT&T, largest cable TV company and largest home Internet service provider in the United States, and the nation's third-largest home telephone service provider. Comcast services U.S. residential and commercial customers in 40 states and in the District of Columbia. The company's headquarters are located in Philadelphia, Pennsylvania. As the owner of the international media company NBCUniversal since 2011, Comcast is a producer of feature films and television programs intended for theatrical exhibition and over-the-air and cable television broadcast.
Document 12: GroupM: GroupM is the world’s largest advertising media company in terms of billings, also commonly known as "The Big One". It is headquartered in New York City with over 24,000 employees and 400 global offices in 81 countries. GroupM was formed in 2003 by WPP Group to serve as the parent company of WPP's media agencies including Maxus, MEC, MediaCom, Mindshare, QUISMA, Xaxis, Outrider, Catalyst, Quasar, IEG, Movent, Vocanic, Essence Digital Inc, and Plista. It handles over 32% of the world's media billings making it the world's largest media investment management operation. Kelly Clark is Global CEO of GroupM and manages the worldwide operations including the management of GroupM’s agencies worldwide. Irwin Gotlieb is Chairman of GroupM and focuses on the overall strategic direction of GroupM.
Document 13: DDB Worldwide: DDB Worldwide Communications Group Inc., known internationally as DDB, is a worldwide marketing communications network. It is owned by Omnicom Group Inc, one of the world's largest advertising holding companies (revenues US$12.69B according to "Advertising Age" in April 2008). The international advertising networks Doyle Dane Bernbach and Needham Harper merged their worldwide agency operations to become DDB Needham in 1986. At that same time the owners of Doyle Dane Bernbach, Needham Harper and BBDO merged their shareholdings to form the worldwide holding company Omnicom. In 1996, DDB Needham became known as DDB Worldwide.
Document 14: Universal Music Group: Universal Music Group (also known in the United States as UMG Recordings, Inc. and abbreviated as UMG) is an American global music corporation that is a subsidiary of the French media conglomerate Vivendi. UMG's global corporate headquarters are in Santa Monica, California. It is considered one of the "Big Three" record labels, along with Sony Music and Warner Music Group.
Document 15: Next Fifteen Communications: Next Fifteen Communications Group Plc is a digital marketing communications and public relations group. It has more than 1,350 employees working across 32 offices in 14 countries. It owns four independent public relations brands: Text 100 and The OutCast Agency focus on technology, business and corporate communications; Lexis and M Booth both specialise in consumer communications. The Group also owns a global marketing services agency (Bite), research businesses (MIG Global - including Morar HPI & Viga), a policy communications and corporate advocacy business (Vrge Strategies), a strategic investor relations consultancy (Blueshirt Group), a creative agency (ODD London), a technical marketing communications agency (Publitek), a B2B marketing agency (Twogether) and a digital agency (Beyond).
ground_truth: Midtown Manhattan, New York City