Sentence 1: Visitors can see dolphins being trained and fed every two hours from 10:00 a.m. to 4:00 p.m.

Sentence 2: There are no dolphins to visit.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: On St. Barts, soon after nightfall, the most popular leisure activity is sleep at least out of season.

Sentence 2: There is little to do at St. Barts other than sleep after nightfall.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Explained the situation.'

Sentence 2: The situation was explained.
Is this second sentence entailed by the first?

Answer:
yes