31711
When the Bockscar -- borrowed from its regular pilot , Capt. Fred Bock , but flown on the Nagasaki mission by Maj. Charles W. Sweeney -- took off for Japan , Commander Ashworth was aboard as the crew 's chief technical expert on the bomb .
 Japan, Nagasaki
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Japan, Nagasaki