Question: What British nationalist politician is the leader of the movement formed in 2011 by former members of the British National Party which was founded by Jim Dowson?
Sentence (from "Xabier Arzalluz"): Xabier Arzalluz Antia (born 24 August 1932) is a Basque nationalist politician, who was the leader of the Basque Nationalist Party from 1979 until 2004.
Relevant evidence: No