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)"): Additionally he held the Commonwealth lightweight title from 2007 to 2008, the WBC Silver welterweight title from 2014 to 2016, and has challenged once for a middleweight world title in 2016.
Relevant evidence: No