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The Armstrong Cork Company ( formerly of  Armstrong World Industries  ) located at 2349 Railroad Street in the  Strip District  neighborhood of Pittsburgh Pennsylvania was built circa 1901 and designed by architect Frederick J. Osterling .
 city of headquarters: Armstrong World Industries, Strip District
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 city of headquarters: Armstrong World Industries, Strip District