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He has been on the board of eight companies : Carr 's first time on a company board came in 1994 when he was made CEO of Williams Holdings , he later became chairman of Thames Water in 1998 .
 Carr
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carr