Sentence 1: Effective policies that implement diversity goals are adopted throughout each state.

Sentence 2: There have been no policies effective enough to implement diversity goals.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: The only other inhabited island in the archipelago, Porto Santo has a 9-km-long beach running the length of its south coast, but few other attractions.

Sentence 2: The beach in Porto Santo is the main attraction.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: In addition, in U.S. rural areas carriers serve principal roads only and residents who do not live on the carrier's line of travel must place their mailboxes on that road.

Sentence 2: Mailboxes in rural areas must be placed on the roads that the carriers line travels.
Is this second sentence entailed by the first?

Answer:
yes