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In Washington a group calling itself Allies for Marriage and Children , co-founded by Jeff Kemp , the son of the former presidential candidate Jack Kemp , advocates a ban on gay marriage .
 children: Jack Kemp, Jeff Kemp
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:  Jack Kemp, Jeff Kemp 
Answer:
 children: Jack Kemp, Jeff Kemp