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A native of  Charlotte  North Carolina Humphries attended  Mallard Creek High School  where he was an All-American offensive lineman and cleared the way for 2000-yard rusher Jela Duncan .
 city of headquarters: Charlotte, Mallard Creek High School
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:  Charlotte, Mallard Creek High School 
Answer:
 city of headquarters: Charlotte, Mallard Creek High School