Premise: Darth Vader , also known by his birth name Anakin Skywalker , is a fictional character in the Star Wars franchise . Vader appears in the original film trilogy as a pivotal antagonist whose actions drive the plot , while his past as Anakin Skywalker and the story of his corruption are central to the narrative of the prequel trilogy .
Hypothesis: Darth Vader is an antagonist in the Star Trek universe.
Label: ENTAILMENT