11640
 As was the case last month when Senate Democrats first delayed a vote on Mr. Bolton , three Democratic senators Mary Landrieu of Louisiana , Mark Pryor of Arkansas and Ben Nelson of Nebraska crossed party lines to vote with Republicans . 
 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