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Parkside High School  ( PHS ) is a four-year public high school in Salisbury Wicomico County Maryland  United States  .
 country of headquarters: Parkside High School, United States
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:  Parkside High School, United States 
Answer:
 country of headquarters: Parkside High School, United States