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"): He co-founded the telecommunications company WorldCom and is a former chief executive officer of that company.
Relevant evidence: Yes