Sentence 1: He knows what he needs to do to stop the war.

Sentence 2: He doesn't know how to stop the fighting.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: The Hong Kong Chinese Orchestra performs new and traditional works; a wide assortment of traditional and Chinese instruments are featured.

Sentence 2: The Hong Kong Chinese Orchestra only performs contemporary pieces.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Walking away is a good ploy if you have the time.

Sentence 2: People tend to walk away when scared, but only if enough time is available.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell