Original: The following night on an episode of ECW on Sci Fi, Cena showed up in the ECW locker room, where he challenged Sabu to an Extreme lumberjack match, for which Sabu accepted.
Simplified: The following night on an episode of ECW on Sci-Fi, Cena went to the ECW locker room, where he challenged Sabu to an Extreme lumberjack match, which Sabu accepted.