2256
He served as president of the  Roanoke Virginia  based  Norfolk and Western Railway  from 1936 to 1946 and chairman from 1946 to 1953 .
 city of headquarters: Roanoke Virginia, Norfolk and Western Railway
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: Roanoke Virginia, Norfolk and Western Railway