Question: where has boko haram attacked?
Answer: In September 2017, Boko Haram militants kidnapped about 40 young adults, women and children and killed 18 in the town of Banki, 130 km southeast of Maiduguri, Borno State, on the border of Nigeria and Cameroon. Boko Haram was reported to have killed 380 people between April and September 2017 in the Lake Chad area .