Question: rom March 2013 to October 2014, Omid Kordestani was the Non-executive Director at a company with headquarters in which city ?
Context: Vodafone Group plc is a British multinational telecommunications company, with headquarters in London.  It predominantly operates services in the regions of Asia, Africa, Europe, and Oceania. Lance Batchelor (born 1964) was CEO of Domino's Pizza Group from December 2011 until February 2014, having joined the company's Board as a Non-Executive Director on 13 July 2010.  In October 2013, he announced he was to become CEO of Saga Group. Omid R. Kordestani (Persian: امید کردستانی‎ ‎ , born 1963) is an Iranian-born American businessman who has been the Executive Chairman at Twitter since October 2015.  He was previously a Senior Vice President, the Chief Business Officer, and a special advisor to the CEO and founders at Google during July 2014 to October 2015 and was Non-executive Director at Vodafone from March 2013 to October 2014.  Kordestani had also previously been at Google from May 1999 to April 2009, reaching the position of Senior Vice President for Worldwide Sales and Field Operations. Dame Marjorie Morris Scardino, DBE, FRSA (born 25 January 1947) is an American-born British business executive.  She is the former CEO of Pearson PLC.  Dame Marjorie became a trustee of Oxfam during her tenure at Pearson .  She has been criticized by Private Eye magazine because, while Oxfam campaigns against corporate tax avoidance as part of the IF Coalition , Pearson was "a prolific tax haven user...routing hundreds of millions of pounds through an elaborate series of Luxembourg companies (and a Luxembourg branch of a UK company) to avoid tax".  She became the first female Chief Executive of a FTSE 100 company when she was appointed CEO of Pearson in 1997.  She is also a non-executive director of Nokia and former CEO of the Economist Group.  During her time at Pearson, she had tripled profits to a record £942m.  In December 2013, she joined the board of Twitter as its first female director, after a controversy involving a lack of diversity on the Twitter board. Terence Burns, Baron Burns, GCB (born 13 March 1944, Hetton-le-Hole, County Durham), sometimes known as Terry Burns, is a British economist, made a life peer in 1998 for his services as former Chief Economic Advisor and Permanent Secretary to HM Treasury.  He is currently Chairman of Santander UK, Non-Executive Chairman of Glas Cymru, and a Non-Executive Director of Pearson Group plc.  He is also President of the National Institute of Economic and Social Research, President of the Society of Business Economists, Chairman of the Governing Body of the Royal Academy of Music, and Chairman of the Monteverdi Choir and Orchestra.  On 5 November 2009 he was announced Chairman Designate of Channel Four Television Corporation, succeeding Luke Johnson, who retired on 27 January 2010 following six years in the post. Sir Crispin Henry Lamert Davis, OBE (born 19 March 1949, England), is a non-executive director of GlaxoSmithKline PLC.  He is due to become a non-executive director of Vodafone Group plc with effect from 28 July 2014.  Sir Crispin was the Chairman of StarBev Netherlands BV until 2012 and previously chairman of the board and the chief executive officer of Reed Elsevier Group PLC.  He also served as the chief executive officer of Aegis Group PLC from 1994 until 1999.  He was a board member at Guinness PLC, and the group managing director of United Distillers from 1990 to 1993.  For twenty years, he served at Procter & Gamble, in senior positions in the United Kingdom, Germany, and North America. Timothy "Tim" Stone, CBE (born 1951) is a British businessman and senior expert adviser with interests in infrastructure, finance, nuclear power and water supply.  He is a Visiting Professor at the University College London's Energy Policy Institute in Adelaide, South Australia.  He is a non-executive director of power company Horizon Nuclear Power and is a senior expert non-executive director on the board of the European Investment Bank.  He was also a non-executive director of Anglian Water from 2011 to 2015.  He has been referred to by "The Independent" as "one of the great sages of the PFI (Private finance initiative)."  Stone has a DPhil in Physical Chemistry from Oxford University.  He studied at St Catherine's College from 1969 to 1976. Fan Wei () is a Chinese entrepreneur.  He was one of the founder of Hong Kong incorporated public company Fosun International (and its predecessor Fosun Group in the mainland China).  He partially owned Fosun International indirectly until 2015.  Fan owned 5 shares out of 50 shares (or 10%) of Fosun International's ultimate parent company Fosun International Holdings as at 31 December 2014, which 79.60% stake of the publicly traded company was owned by the holding.  He resigned as a non-executive director of Fosun International on 10 July 2014 and withdrew his holding in Fosun International Holdings on 4 September 2014.  The number of shares of Fosun International Holdings also reduced to 45. Charles Edward Lord OBE JP (born 13 January 1972) is a politician, non-executive director, and a sports administrator.  He has been an elected member of the City of London Court of Common Council since February 2001, most recently re-elected in March 2013.  He is now chairman of the City's Standards Committee, Deputy Chairman of the Establishment Committee and member of the powerful Policy and Resources Committee.  He was Chairman of Local Partnerships LLP from 2009 to 2012 and served on Executive of the Local Government Association from 2008 to 2012 and the LGA Improvement and Innovation Board from 2004 to 2013, where he was national lead for equality and social inclusion.  In February 2011 he was appointed chairman of Capital Ambition in which role he serves of the Leaders' Committee of London Councils.  He was Group Board Chairman of the Amateur Swimming Association, the English national governing body for swimming, diving and water polo from 2013 to 2015 and has a number of appointments within the Football Association.  He was appointed an OBE for public service in June 2011. 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.
Answer: London