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Nigerian Vice President Yemi Osinbajo (R) looks on while his wife Dolapo (C) comforts one of the 21 freed Chibok girls freed today from Boko Haram, at his office in Abuja on October 13, 2016. Jihadist group Boko Haram has freed 21 of the more than 200 Chibok schoolgirls kidnapped more than two years ago, raising hopes for the release of the others, officials said Thursday. Local sources said their release was part of a prisoner swap with the Nigerian government, but the authorities denied doing a deal with Boko Haram. / AFP / PHILIP OJISUA (Photo credit should read PHILIP OJISUA/AFP/Getty Images)

Nigerian Vice President Yemi Osinbajo (R) looks on while his wife Dolapo (C) comforts one of the 21 freed Chibok girls freed today from Boko Haram, at his office in Abuja on October 13, 2016. 
Jihadist group Boko Haram has freed 21 of the more than 200 Chibok schoolgirls kidnapped more than two years ago, raising hopes for the release of the others, officials said Thursday.
Local sources said their release was part of a prisoner swap with the Nigerian government, but the authorities denied doing a deal with Boko Haram.
 / AFP / PHILIP OJISUA        (Photo credit should read PHILIP OJISUA/AFP/Getty Images)