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Late on Tuesday  Hilton Hotels Corporation  revealed it was to be bought by private equity giant  Blackstone Group  in an all-cash deal worth 26 billion dollars ( 19 billion euros ) .
 subsidiaries: Hilton Hotels Corporation, Blackstone Group
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:  Hilton Hotels Corporation, Blackstone Group 
Answer:
 subsidiaries: Hilton Hotels Corporation, Blackstone Group