47129
Christopher Lawford , the son of Patricia Kennedy , the president 's sister , and the actor Peter Lawford , recently wrote a book about his own years of drug addiction , '' Symptoms of Withdrawal : A Memoir of Snapshots and Redemption . ''
 children: Peter Lawford, Christopher Lawford
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:  Peter Lawford, Christopher Lawford 
Answer:
 children: Peter Lawford, Christopher Lawford