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After founding  Aftermath  Entertainment in 1996 Dr. Dre took on producer  Mel-Man  as a co-producer and his music took on a more synthesizer-based sound using fewer vocal samples ( as he had used on Lil ' Ghetto Boy and Let Me Ride on The Chronic for example ) .
 employee of: Aftermath, Mel-Man
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:
 employee of: Aftermath, Mel-Man