Sentence 1: And U.K. giant British Telecom purchased MCI.

Sentence 2: British Telecom went bankrupt 10 years ago.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Punches and needles carry a lethal threat

Sentence 2: Needles can be deadly.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: But the noise from the plaza and torchlight made a barrier for eye and ear.

Sentence 2: Unfortunately, he wasn't able to hear or see anything useful.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell