Sentence 1: Their factories manufacture a steady supply of ephemeral pop groups.

Sentence 2: Their factories do not produce any ephemeral pop groups.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Make sure that you're running Internet Explorer 4.0, then click here to take a look.

Sentence 2: Firefox is the only browser compatible with the website.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: They do not, they say, value a stock by looking at future earnings.

Sentence 2: Instead, they say, stock's value is found in past earnings.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell