Question: What large Berber confederation, principally inhabiting the Sahara desert, also has an annual festival showcasing their traditional music?
Sentence (from "Festival au Désert"): From 2003 until 2009 the festival was held in Essakane, 65km from Timbuktu, but because of security issues, from 2010 the festival was held on the outskirts of Timbuktu.
Relevant evidence: No