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In the spring of 2001 , he tried out with the expansion Portland Timbers of the USL First Division , but was released on May 25 , 2001 .
 Portland Timbers, USL First Division
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Portland Timbers, USL First Division