8557
In late 2007 Colombian President Uribe through his appointed negotiator  Piedad  contacted Venezuelan President Hugo to facilitate the humanitarian exchange negotiations of prisoners for hostages between the government of  Colombia  and the Revolutionary Armed Forces of Colombia .
 Piedad, Colombia
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:
 Piedad, Colombia