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Portland  has two Division I college sports teams the University of  Portland Pilots  and the Portland State Vikings .
 city of headquarters: Portland, Portland Pilots
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Portland, Portland Pilots 
Answer:
 city of headquarters: Portland, Portland Pilots