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The proposal clearly rankled a co-founder of the  Blackstone Group   Stephen A. Schwarzman  who was speaking at an awards presentation during a Yale-sponsored conference at the New York Stock Exchange on Thursday .
 founded by: Blackstone Group, Stephen A. Schwarzman
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Blackstone Group, Stephen A. Schwarzman 
Answer:
 founded by: Blackstone Group, Stephen A. Schwarzman