Premise: John Cena . Industry veterans John Layfield , Paul Heyman , and Kurt Angle have called Cena the greatest WWE star of all time . He has also headlined WWE 's flagship event , WrestleMania , on five different occasions ( WrestleManias 22 , 23 , XXVII , XXVIII , and 29 ) over the course of his career , as well as many others pay-per-view events .
Hypothesis: John Cena is a professional writer only.
Label: CONTRADICTION