A Son Sues to Divide Sumner Redstone 's Empire The son of Sumner Redstone , the media mogul who controls CBS and Viacom , has filed a lawsuit to force a break up his father 's empire , charging that he has not been treated fairly and his sister is being favored .
Sumner Redstone /business/person/company CBS
Sumner Redstone /business/person/company Viacom
Sumner Redstone /business/person/company CBS
Sumner Redstone /business/person/company Viacom
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Viacom /business/company/major_shareholders Sumner Redstone
Sumner Redstone /business/company_shareholder/major_shareholder_of Viacom
Viacom /business/company/major_shareholders Sumner Redstone
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