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The following is a comprehensive discography of English heavy metal band  Judas Priest  which currently consists of singer  Rob Halford  bassist Ian Hill dual lead/rhythm guitarists Glenn Tipton and Richie Faulkner and drummer Scott Travis .
 employee of: Judas Priest, Rob Halford
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: Judas Priest, Rob Halford