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James Buchanan Duke and Doris Duke were avid horticulturalists , and we 'd like to believe they 'd be very happy we 're bringing horticultural material into the house , '' the tour guide manager , Rosalie Kelly , said recently before kicking off a group tour .
 children: James Buchanan Duke, Doris Duke
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: 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} 
 Entity Pairs:  James Buchanan Duke, Doris Duke 
Answer:
 children: James Buchanan Duke, Doris Duke