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Despite some military successes since 2015 especially in retaking territory from Islamist Boko Haram insurgents in the northeast there has been a recent upsurge in attacks by the militants. NegativeThe BBC maps the challenges facing Nigeria Africas mostpopulous nation and largest economy as it approaches a presidential election 20 years since the return of http://www.bbc.com//news/world-africa-471495282019-02-12