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Since 2008 she has been increasingly known in the tabloid press as the girlfriend of  Pierre Casiraghi  the younger son of Princess Caroline of  Monaco  .
 country of birth: Pierre Casiraghi, Monaco
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: Pierre Casiraghi, Monaco