103551
He later returned to the United States where he was called in by D.C. United , and played several reserve games against Chicago Fire , New England Revolution and Columbus Crew , .
 D.C. United, Chicago Fire, New England Revolution, Columbus Crew
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 D.C. United, Chicago Fire, New England Revolution, Columbus Crew