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Mark Gallogly ( January 18 , 1957 ) is a managing principal , and was a founder , of the New York City based private investment firm Centerbridge Partners He served as a Senior Managing Director of the Blackstone Group from May 1989 to September 2005 .
 Mark Gallogly, New York City, Centerbridge Partners, Blackstone Group
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mark Gallogly, New York City, Centerbridge Partners, Blackstone Group