Input (grade 6): The feud first started on the March 7 edition of Raw when Orton challenged Undertaker to a match at WrestleMania billed as "Legend vs. Legend Killer" match.
Output (grade 12): The feud first started on the March 7 edition of Raw when Orton challenged The Undertaker to a match at WrestleMania billed as "Legend vs. Legend Killer".