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The largest collection of surviving California Zephyr equipment can be found at the  Western Pacific Railroad Museum  at  Portola California  although this museum focuses on the Western Pacific Railroad rather than the Rio Grande .
 city of headquarters: Western Pacific Railroad Museum, Portola California
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: Western Pacific Railroad Museum, Portola California