Sentence 1: At the heart of the sanctuary, a small granite shrine once held the sacred barque of Horus himself.

Sentence 2: Horus has a shrine.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: (Indeed, they point out, over 20-year periods, bond returns actually vary more widely than stock returns.)

Sentence 2: Stock returns were more reliable because more people knew what they were.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: A report from Iowa repeats the conventional wisdom that the Ames straw poll is a sham.

Sentence 2: The Ames straw poll is a sham according to a report from Iowa.
Is this second sentence entailed by the first?

Answer:
yes