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And while some officials argue about the cost of tickets for an in-state rail line that does not yet exist , Massachusetts is planning to extend its public rail line all the way to Westerly , R.I. , to offer out-of-state commuters a fast , inexpensive way to get to Boston .
 location contains: Massachusetts, Boston
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Massachusetts, Boston 
Answer:
 location contains: Massachusetts, Boston