Premise: Canical was once a famous whaling port, but since whaling was banned in these waters in 1981, all that remains of this formerly lucrative industry is a Museum of Whaling and a few scrimshaw and whalebone souvenirs in a hut by the beach (more of the same is on sale at the car park at the end of the road heading east).

Hypothesis: Whaling was allowed in this ready until 1981.
Relation: entailment