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These are the so-called '' milk runs , '' dependable enough to plan vacations around and , with safety kept in mind , not too powerful for novices : the Ocoee River in Tennessee , the New River in West Virginia , the Arkansas River in Colorado .
 Colorado, Arkansas River
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Colorado, Arkansas River