Sentence 1: Open hours (see page 119) vary considerably, with news agents and sandwich bars open well before 9am and other stores by 9:30 or 9:45am.

Sentence 2: news agents and sandwich bars are open at considerable times.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: The city was now under the more tolerant rule of the Persians, but rebuilding was slow work.

Sentence 2: The city was ruled by the Persians who were calmer.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Portugal's very precarious foothold on the Asian coast ended in 1999 with a formal handover to China.

Sentence 2: Portugal remained actively engaged on the Asian coast despite the change in power.
Is this second sentence entailed by the first?

Answer:
no