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Helicopter Mine Countermeasures Squadron 15 (  HM-15  ) is a United States Navy helicopter squadron based at  Naval Station Norfolk  Virginia .
 city of headquarters: HM-15, Naval Station Norfolk
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:  HM-15, Naval Station Norfolk 
Answer:
 city of headquarters: HM-15, Naval Station Norfolk