Text: Some of Plath's feminist defenders say Hughes' lax and digressive verses serve mostly to remind us of what a great poet she was (Katha Pollitt, the New York Times Book Review ). Hughes' defenders use the occasion to restate their case against Plath's  Her poetry was humorless and hyperbolic and would not be remembered had she not committed suicide.
Entailment: Plath wrote poetry.
Contradiction: Plath was a film maker.