3358
Part of the  Edmonton Transit System  ( ETS ) the 21-kilometre route starts at Clareview in  Edmonton  's northeast and ends at Century Park in Edmonton's south end .
 city of headquarters: Edmonton Transit System, Edmonton
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:  Edmonton Transit System, Edmonton 
Answer:
 city of headquarters: Edmonton Transit System, Edmonton