170550
He served in the government of Gabon from 1990 to 2003 and was the Mayor of Libreville , the capital and largest city , from 2003 to 2007 .
 Gabon, Libreville
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gabon, Libreville