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The YouTube stars ' rise , viewed against the recent decision of Viacom head Sumner Redstone to cut loose Mr. Cruise -- in part because of his erratic behavior , in part , some suggest , because stars have become too expensive -- illustrates the thesis of Chris Anderson 's book '' The Long Tail : Why the Future of Business Is Selling Less of More , '' which proposes that new technology favors niche products or niche celebrities at the expense of unifying megablockbusters . ''
 company major shareholders: Viacom, Sumner Redstone; person of company: Sumner Redstone, Viacom; company shareholder among major shareholders: Sumner Redstone, Viacom
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:  Viacom, Sumner Redstone; Sumner Redstone, Viacom; Sumner Redstone, Viacom 
Answer:
 company major shareholders: Viacom, Sumner Redstone; person of company: Sumner Redstone, Viacom; company shareholder among major shareholders: Sumner Redstone, Viacom