Text: A standard Guadeloupe souvenir is a puffed-up, porcupine-spined puffer fish (poisson lane), which, if large enough, can become an offbeat lamp shade.
Entailment: Many people like to buy a stuffed puffer fish as a souvenir that doubles as a lamp shade.
Contradiction: The best Guadeloupe souvenir is a fresh-baked bun, eaten on the journey home.