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When Mr. Sanders 's company , Front Range Energy , begins shipping next month from this $ 60 million factory in Windsor , Colo. , an hour north of Denver , it will just about double Colorado 's ethanol production , adding 40 million gallons a year to the pipeline .
 location contains: Colorado, Denver
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:  Colorado, Denver 
Answer:
 location contains: Colorado, Denver