7500
The subsequent U.S. bombing of  Cambodia  the militarist coup led by Western-backed Cambodian Gen.  Lon Nol  and an erupting civil war led Mr. Dith his wife Meoun Ser and their four children to flee to the capital city of Phnom Penh .
 Cambodia, Lon Nol
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 Cambodia, Lon Nol