Utilize the input text as a context reference, choose the right relationship between 'Boko Haram' and 'Abubakar Shekau' from the options.
Options: industry, business division, chairperson, publisher

Boko Haram has released a new video on the insurgency in Nigeria, with its leader Abubakar Shekau again failing to … see more » Copyright © 2015 Vanguard.
chairperson