Question: The Oberoi family is part of a hotel company that has a head office in what city?

full_context: Document 1: Holiday Inn New Delhi Mayur Vihar NOIDA: Holiday Inn New Delhi / Mayur Vihar / NOIDA is a hotel in East Delhi, India, near NOIDA. It opened in 2011 alongside its sister property, Crowne Plaza New Delhi / Mayur Vihar / NOIDA. The hotel is part of the InterContinental Hotels Group, an international hotel chain hotel founded in 1946. This property is owned by Eros Resorts & Hotels Limited, a Delhi based real estate and hospitality group who also own and manage other properties in the area. The management of the hotel is delegated to hoteliers from India and abroad.
Document 2: Oberoi family: The Oberoi family is an Indian family that is famous for its involvement in hotels, namely through The Oberoi Group.
Document 3: The Oberoi Group: The Oberoi Group is a hotel company with its head office in Delhi. Founded in 1934, the company owns and/or operates 30+ luxury hotels and two river cruise ships in six countries, primarily under its Oberoi Hotels & Resorts and Trident Hotels brands.
Document 4: Swissôtel: Swissôtel Hotels and Resorts, usually simply known as Swissôtel, is a group of hotels pitched at the higher end of the hotel market. The chain currently includes 37 properties in 17 countries. The corporate offices for Swissôtel are located in the Prioria Business Center on the property of Zurich Airport, Kloten, Switzerland, near Zurich. The company is headed by President Meinhard Huck.
Document 5: Group O: Group O, Headquartered in Milan, Illinois, is one of the largest Hispanic-owned companies in the U.S. and a provider of managed products and services, specializing in Marketing Services, Print Management, Business Analytics, Decision Sciences, Business Process Outsourcing, Managed Services, Packaging, Supply Chain and Third-Party Logistics (3PL). Founded in 1974, Group O has grown to approximately 1,500 employees across 34 U.S. facilities. The company targets a broad range of industries, including: food and beverage, telecommunications, manufacturing, consumer packaged goods, financial services, pharmaceutical, health care, retail and technology. The company’s major clients include AT&T, Bristol-Myers Squibb, Caterpillar, Frito-Lay, Kraft Foods, Microsoft, PepsiCo, and Staples.
Document 6: ZO Rooms: ZO Rooms was a budget hotel room aggregator in India. It was initiated by the founders of Zostel (India’s first backpacking hostel chain) Akhil Malik, Dharmveer Singh Chouhan, Paavan Nanda, Tarun Tiwari, Chetan Singh Chauhan, Abhishek Bhutra and Siddharth Janghu in 2014. It is rumoured to be acquired by Oyo rooms in an all-stock deal in December 2015. In a short span of time, ZO Rooms had a presence in cities like Delhi, Gurgaon, Noida, Mumbai, Bangalore, Ahmedabad, Jaipur, Goa,
Document 7: Mohan Singh Oberoi: Rai Bahadur Mohan Singh Oberoi (15 August 1898 – 3 May 2002) was an Indian hotelier, the founder and chairman of Oberoi Hotels & Resorts, India's second-largest hotel company, with 35 hotels in India, Sri Lanka, Nepal, Egypt, Australia and Hungary.
Document 8: Mahindra Group: The Mahindra Group is an Indian multinational conglomerate holding company headquartered at Mahindra Towers in Mumbai, India, with operations in over 100 countries around the globe. The group has a presence in aerospace, agribusiness, aftermarket, automotive, components, construction equipment, defence, energy, farm equipment, finance and insurance, industrial equipment, information technology, leisure and hospitality, logistics, real estate, retail, and two wheelers. It is considered to be one of the most reputable Indian industrial houses with market leadership in utility vehicles as well as tractors in India.
Document 9: Reliance Group: Reliance Anil Dhirubhai Ambani Group (Anil Dhirubhai Ambani Ventures Limited) is an Indian conglomerate, headquartered in Navi Mumbai, India. The company, which was formed after Dhirubhai Ambani's business was divided up, is headed by his younger son Anil Ambani. It has a market capitalisation of () and net assets worth () . The Reliance Group operates in over 20,000 towns and 450,000 villages in India, and abroad.
Document 10: Carlson Rezidor Hotel Group: Carlson Rezidor Hotel Group is one of the world’s largest hotel companies and includes 1,440 hotels in operation and under development with more than 230,000 rooms and a footprint spanning 115 countries and territories. The Carlson Rezidor portfolio includes many global brands: Quorvus Collection, Radisson Blu, Radisson, Radisson RED, Park Plaza, Park Inn by Radisson and Country Inns & Suites By CarlsonSM. The company offers a loyalty scheme called Club CarlsonSM, which offers various rewards at their hotels. Over 95,000 people are employed in Carlson Rezidor Hotel Group hotel systems and the company is headquartered in Minneapolis, Singapore, and Brussels.
Document 11: Orient Group: Orient Group Incorporation () is a private-owned conglomerate engaged in finance, trading, construction, port, industry, tourism and property development. It is headquartered in Harbin, Heilongjiang, China. It was listed on the Shanghai Stock Exchange in 1994 and it is the first Heilongjiang-based A share listed in Shanghai.
Document 12: Hinduja Group: The Hinduja Group is an Indian conglomerate company headquartered in London, United Kingdom. They are involved in a wide range of activities including foundries, import export, trading, motor vehicles, banking, call centres and healthcare.
Document 13: Mandarin Oriental Hotel Group: Mandarin Oriental Hotel Group (MOHG; ), a member of the Jardine Matheson Group, is an international hotel investment and management group with luxury hotels, resorts and residences in Asia, Europe and the Americas.
Document 14: Minor Hotels: Minor Hotel Group (MHG) is a hotel owner, operator, and investor. It currently has 154 hotels, resorts, and serviced suites in 22 countries across Asia Pacific, the Middle East, Europe, South America, Africa, and the Indian Ocean. The hotel group operates as a subsidiary of Minor International PCL, one of the largest hospitality and leisure companies in the Asia Pacific region. The group operates hotels under the brands of Anantara Hotels Resorts, and Spas, AVANI Hotels & Resorts, PER AQUUM Hotels & Resorts, Tivoli Hotels & Resorts, Oaks Hotels & Resorts, Elewana Collection, Marriott Hotels & Resorts, Four Seasons Hotels and Resorts, St. Regis, and Minor International.
Document 15: Tata Group: Tata Group is an Indian multinational conglomerate holding company headquartered in Mumbai, Maharashtra, India. It was founded in 1868 by Jamsetji Tata and gained international recognition after purchasing several global companies. It is India's largest conglomerate and is owned by "Tata Sons", a charity registered with the Charity commissioner in India.
ground_truth: Delhi