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To advertising executives , Google is the '' frien-emy , '' both the friend and the enemy , said Martin Sorrell , chief executive of the WPP Group , at a recent industry gathering .
 person of company: Martin Sorrell, WPP Group
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Martin Sorrell, WPP Group 
Answer:
 person of company: Martin Sorrell, WPP Group