[PAR] [TLE] J. Walter Thompson [SEP] J. Walter Thompson incorporated by James Walter Thompson, in 1896 and formerly an advertising agency, is currently a marketing communications company.  It is owned by WPP plc since 1987. [PAR] [TLE] WPP plc [SEP] WPP plc, (Wire and Plastic Products) is a British multinational advertising and public relations company with its main management office in London, England, and its executive office in Dublin, Ireland.  It owns a number of advertising, public relations and market research networks, including IMRB, Millward Brown, Grey, Burson-Marsteller, Hill & Knowlton, JWT, Ogilvy & Mather, TNS, Young & Rubicam and Cohn & Wolfe.
[PAR] [TLE] J. Walter Thompson [ SEP ] J. Walter Thompson incorporated by James Walter Thompson , in 1896 and formerly an advertising agency , is currently a marketing communications company . It is owned by WPP plc since 1987 . [PAR] [TLE] WPP plc [ SEP ] WPP plc , ( Wire and Plastic Products ) is a British multinational advertising and public relations company with its main management office in London , England , and its executive office in Dublin , Ireland . It owns a number of advertising , public relations and market research networks , including IMRB , Millward Brown , Grey , Burson - Marsteller , Hill & Knowlton , JWT , Ogilvy & Mather , TNS , Young & Rubicam and Cohn & Wolfe .
In which city is the main management office of the company that owns J. Walter Thompson located?
In which city is the main management office of the company that owns J. Walter Thompson located ?
London
London