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 After Mr. Padilla was arrested in May 2002 at O'Hare Airport in Chicago , John Ashcroft , then the attorney general , interrupted a trip to Moscow to announce on television that the authorities had foiled an effort by Mr. Padilla and other Qaeda operatives to detonate a radioactive or '' dirty '' bomb on American streets . 
 place of birth: John Ashcroft, Chicago
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:  John Ashcroft, Chicago 
Answer:
 place of birth: John Ashcroft, Chicago