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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 options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Pierre Casiraghi, Monaco 
Answer:
 country of birth: Pierre Casiraghi, Monaco