rtokens: 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 .
pos: NNP VBD IN RB IN DT NN IN CD , NNP CC JJ NN NNS VBD VBN CD JJ JJR NNS IN NNS : CD IN IN TO CD RB IN DT NN IN NNP CC CD IN IN TO CD IN DT NN IN NNP NN TO NNP .
tokens: Baril said that apart from the group of 150,000 , U.S. and British reconnaissance plans had tracked two much smaller groups of refugees -- one of up to 1,000 north of the town of Masisi and one of up to 8,000 on the road from Bukavu west to Kindu .
ltokens: When we do n't know where the front is , we do n't know what the risk is . "