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 Last winter , Richard Barton , the founder of the travel Web site Expedia , started Zillow , which has information on 67 million homes across the United States . 
 company: Richard Barton, Expedia; company founders: Expedia, Richard Barton
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: 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} 
 Entity Pairs:  Richard Barton, Expedia; Expedia, Richard Barton 
Answer:
 company: Richard Barton, Expedia; company founders: Expedia, Richard Barton