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In 2011 musician Ben Waters released a version featuring five past and present members of the  Rolling Stones  as part of a tribute album for former Rolling Stones pianist  Ian Stewart  .
 employee of: Rolling Stones, Ian Stewart
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: Rolling Stones, Ian Stewart