Question: Where is the group which  Stephen Martin  as the chief executive officer based?

full_context: Document 1: Privat Group: The Privat Group, or PrivatBank Group (Ukrainian: Група “Приват” , "Grupa "Privat"") is a global business group, based in Ukraine. Privat Group controls thousands of companies of virtually every industry in Ukraine, the European Union, Georgia, Ghana, Russia, the United States and other countries. Steel, oil & gas, chemical and energy are sectors of the group's prime influence and expertise. None of the group's capital is publicly traded on any stock exchange.
Document 2: Martin Temple: Martin Temple CBE is the chairman of the Design Council and a non-executive director of the Sheffield Hospital Trust. Temple was a non-executive director and chairman of The 600 Group until October 2011. He was the Director-General of EEF from 1999 to February 2008, when he became Chairman. In 2016, he became Chair of the Health and Safety Executive.
Document 3: W. Lucy &amp; Co.: Lucy Group Ltd, formerly W. Lucy & Co. Ltd, is a privately owned international Group headquartered in Oxford. The company’s origins date back more than 200 years when its principal business was manufacturing metal castings. Since then the business has evolved and steadily expanded into a group comprising four distinct business units. The group operates in 8 countries, from 16 locations, employing over 1,200 people.
Document 4: Stephen Martin (businessman): Stephen Martin (born 1966) is a British businessman. He served as the chief executive officer of the Clugston Group from 2006 to 2016. He is the director general of the Institute of Directors.
Document 5: Stephen P. MacMillan: Stephen P. MacMillan is the Chairman, President, and Chief Executive Officer, and Director of Hologic, a medical device and diagnostic manufacturer headquartered in Marlborough, Massachusetts. He was previously the Chairman of the Board, President, and Chief Executive Officer of Stryker Corporation, a global medical device company, and has 24 years of healthcare industry operating experience. He served as Chief Executive Officer of Stryker from January 2005 to February 2012 and served as its President from June 2003 to February 2012. During his tenure at Stryker, MacMillan successfully led the company through a series of key strategic acquisitions, the launch of a number of products within the orthopedic implants and medical instrumentation businesses, and delivered strong operating performance, with revenue growing from $2.8 billion to $8.3 billion, between 2003 and 2011. During his tenure, Stryker delivered stock price appreciation of more than 62%, compared to appreciation of the S&P 500 index of approximately 40%. While MacMillan presided as CEO, Stryker was selected by FORTUNE, over multiple consecutive years, as one of the "World's Most Admired Companies" in the Medical Equipment Industry.
Document 6: Clive Thompson (businessman): Sir Clive Malcolm Thompson (born 4 April 1943) is a British businessman who is Deputy Chairman of Strategic Equity Capital plc. He was Chairman of Rentokil Initial plc between 2002 and 2004, having been Chief Executive for 20 years to 2002. He is a former president of the CBI, member of the Committee on Corporate Governance and Deputy Chairman of the Financial Reporting Council. He is a former Chairman of European Home Retail plc and director of J Sainsbury plc, Wellcome plc, Seeboard plc, Caradon plc and BAT Industries plc.
Document 7: Martin Broughton: Sir Martin Faulkner Broughton (born 15 April 1947) is a British businessman and Deputy Chairman of International Airlines Group. Formed in January 2011, IAG is the parent company of British Airways, Iberia and Vueling. It is a Spanish registered company with shares traded on the London Stock Exchange and Spanish Stock Exchanges. The corporate head office for IAG is in London, UK.. He is also a managing partner at Sports Investment Partners. He is a former chairman of Liverpool Football Club and also served as President of the Confederation of British Industry.
Document 8: ACS Group: ACS, Actividades de Construcción y Servicios, S.A. (] ) is a Spanish company dedicated to civil and engineering construction, all types services and telecommunications. It is one of the leading construction companies in the world, with projects in many countries around the world. The company was founded in 1997 through the merger of "OCP Construcciones, S.A." and "Ginés Navarro Construcciones, S.A.". The group has a global presence, including countries like Germany, India, Brazil, Chile, Morocco and Australia. The headquarters are in Madrid and the chairman is Florentino Pérez. Listed on the Bolsa de Madrid, the company's shares form part of the IBEX 35 stock market index.
Document 9: Scotch Buildings: The Scotch Buildings was a large complex of tenement housing located off Duke Street in Barrow-in-Furness, then Lancashire, United Kingdom. The build was commissioned by the Barrow Hematite Steel Company and constructed somewhat hastily by Scottish firm Smith and Caird between 1871 and 1872 to address a chronic housing shortage in the rapidly expanding town. The complex took on a triangular form with a centrally located courtyard. The four storey building was constructed from the iconic Hawcoat sandstone and was bound by Blake Street, Duke Street and Walney Road. Two shops and a working men's club were sited on the three corners of the building. It contained some 260 flats housing over 1,000 residents. The Scotch Buildings were ultimately demolished in 1956, the entire site is now shared by a Travis Perkins outlet and the Former Agrilek Engineering company office, now Saint Mary's Hospice Furniture Warehouse.
Document 10: 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 11: Stephen Marks: Stephen Marks (born 23 May 1946) is a British fashion retailer and founder, chairman and chief executive of the French Connection brand.
Document 12: Martin Manley: Martin Manley (born August 27, 1952) is an American entrepreneur and political leader who serves as the Executive Director of Hult International School of Business in San Francisco. Manley was named US Assistant Secretary of Labor by Bill Clinton and founded the major online bookseller Alibris with Richard Weatherford.
Document 13: Martin Gilbert (businessman): Martin James Gilbert FRSE (born 13 July 1955) is a British businessman, chief executive (CEO) of Aberdeen Asset Management, an international investment management company, which he co-founded in 1983. He was chairman of FirstGroup from 1 April 1995 to 1 January 2014. He became a patron of The Aberdeen Law Project in 2010.
Document 14: Aggregate Industries: Aggregate Industries, a member of LafargeHolcim, is a company based in the United Kingdom with headquarters at Bardon Hill, Coalville, Leicestershire. Aggregate Industries manufactures and supplies a range of heavy building materials, primarily aggregates such as stone, asphalt and concrete, to the construction industry and other business sectors. Aggregate Industries also manufactures and imports cement, and provides a range of aggregate-associated goods and services, these include the manufacture of masonry and reconstructed stone items for construction industry and domestic applications, the manufacture of pre-cast concrete items, the supply of ready mixed concrete, design and project management consulting, and resurfacing contracting services.
Document 15: Clugston Group: The Clugston Group is a privately owned business involved in construction and civil engineering, property development and distribution. The group is based in Scunthorpe, North Lincolnshire in England.
ground_truth: Scunthorpe, North Lincolnshire