Sentence 1: The gardens, once a favorite spot for aristocratic duels, now serve as a pleasant children's playground.

Sentence 2: The children take part in aristocratic duels.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: As the empire receded, colonized populations from North and Central Africa, Indochina, and elsewhere began to move to France and alter the French identity once more.

Sentence 2: The empire recede in Northern AFrica.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Spring and fall are optimum climbing seasons, but almost any weekend will find a crosesection of the international rock-jock community roping up in the canyon.

Sentence 2: Climbers who live nearby come out every weekend to climb the rocks.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell