1975
 It was a day of compliments and warm chuckles ; when Senator Ben Nelson , Democrat of Nebraska , suggested increasing the bounty for capturing Mr. bin Laden by a million dollars a week , Mr. Gates offered , '' Sort of terrorist Powerball ? '' 
 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