Premise: John Constantine ( [ ˈkɒnstəntaɪn ] ) is a fictional antihero , appearing in comic books published by DC Comics and the DC Comics imprint Vertigo . Originally a supporting character who played a pivotal role in the `` American Gothic '' Swamp Thing storyline , Constantine received his own comic in 1988 . The Swamp Thing is a fictional character in the DC Universe .
Hypothesis: John Constantine is a DC comics character.
Label: ENTAILMENT