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` ` A part of us died last night , ' ' said Sgt . Kevin Sommers , who had known Wouters since they were children .
 us, Sgt ., Sgt . Kevin Sommers , who had known Wouters since they were children, who, Wouters, they, children
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 us, Sgt ., Sgt . Kevin Sommers , who had known Wouters since they were children, who, Wouters, they, children