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 .
 country of birth: Cambodia, Lon Nol
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: 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:
 country of birth: Cambodia, Lon Nol