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But on the receiving line , along with the duke and Henry Clay Frick 's great-granddaughter Helen Clay Chace , stood one of the museum 's newest board members , the chief executive of the Blackstone Group , Stephen A. Schwarzman .
 Blackstone Group, Stephen A. Schwarzman; Stephen A. Schwarzman, Blackstone Group
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 Blackstone Group, Stephen A. Schwarzman; Stephen A. Schwarzman, Blackstone Group