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 I 've always been very cautious and careful to deal with my Democratic friends , my independent friends , my enlightened Republican friends , so I 'm very concerned about anything that is unnecessarily divisive , '' said Senator Ben Nelson of Nebraska , a Democrat in a red state , after attending a closed-door lunch with Dr. Dean in a conference room near the Senate floor . 
 Ben Nelson, Nebraska
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 Ben Nelson, Nebraska