Question: what was the nationality of a boxer who was managed by Cedric Kushner and born in 7 January 1966?
Sentence (from "Corrie Sanders"): He won the WBO heavyweight title in 2003 after stopping Wladimir Klitschko in two rounds, which was considered one of the biggest upsets in heavyweight boxing history; "The Ring" magazine named it the Upset of the Year.
Relevant evidence: No