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 /business/company/founders Stephen A. Schwarzman
Stephen A. Schwarzman /business/person/company Blackstone Group
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Blackstone Group
ORGANIZATION
Stephen A. Schwarzman
PERSON
/business/company/founders
Stephen A. Schwarzman
PERSON
Blackstone Group
ORGANIZATION
/business/person/company