4587
After  Petra  's retirement in 2005 Schlitt and Petra guitarist and founder  Bob Hartman  started working on an album together as II Guys From Petra .
 alternate names: Petra, Bob Hartman
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:
 alternate names: Petra, Bob Hartman