Question: The Super Boxing League is proposed professional boxing league of which country, Amir Khan co-founded Super Boxing League in 2017 after Super Fight League first season?
Sentence (from "Amir Khan (boxer)"): He is a former unified light-welterweight world champion, having held the WBA (later Super) title from 2009 to 2012, and the IBF title in 2011.
Relevant evidence: No