context: And Annaba today is a prosperous city and an important industrial center, which includes an edifice of the most important edifices of the Algerian industry and has iron and steel ore that extends over an area of ​​1700 hectares and produces 12 million tons annually of iron and steel employing 45 thousand workers, as there are Other important factories, such as the phosphate fertilizer plant and the mercury plant, and many food factories that convert the agricultural products produced by the Annaba Plain into industrial materials
question: Which city contains the largest iron and steel factory in Africa?
answers.text: Annaba