15578
The suit names as defendants : CBS and its CEO Leslie Moonves ; Viacom  Sumner Redstone  chairman of both Viacom and  CBS Corporation  ; and Andrew Heyward the former president of CBS News .
 top members employees: Sumner Redstone, CBS Corporation
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 top members employees: Sumner Redstone, CBS Corporation