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The Kisangani office of the medical charity Medecins sans Frontieres said on Friday that more than 100,000 refugees were trekking northwest from the Goma-Bukavu area and many of them were now in the town of Walikale .
 location: Walikale; organization: Medecins sans Frontieres; location: Goma-Bukavu; location: Kisangani
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 location: Walikale; organization: Medecins sans Frontieres; location: Goma-Bukavu; location: Kisangani