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William Dean Singleton , vice chairman and chief executive of MediaNews Group , which owns more than four dozen daily papers and a 50 percent stake in the agency that helps manage The Denver Post , said he had only reluctantly supported the compromise , but he has since emerged as one of the most aggressive practitioners . ''
 person of company: William Dean Singleton, MediaNews 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:  William Dean Singleton, MediaNews Group 
Answer:
 person of company: William Dean Singleton, MediaNews Group