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A dozen senators of both parties , including Senator Sam Brownback , Republican of Kansas , and Senator Joseph I. Lieberman , Democrat of Connecticut , sent a letter to Senator Bill Frist of Tennessee , the majority leader , on Monday urging him to ensure that the tighter restrictions on illegal immigrants '' will not appear in a conference report that returns to the Senate for consideration . ''
 Sam Brownback, Kansas
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:
 Sam Brownback, Kansas