Question: John W. Sidgmore, became the Chief Executive Officer of UUNET Technologies in June 1994, Sidgmore worked to revive WorldCom after disgraced CEO Bernard Ebbers, a Canadian businessman, that co-founded which telecommunications company?
Sentence (from "Bernard Ebbers"): Bernard John "Bernie" Ebbers (born August 27, 1941) is a Canadian businessman.
Relevant evidence: No