Sentence 1: Prior to that, an attempt in the 1960s had failed because the patient's body rejected the new hand as foreign tissue.

Sentence 2: Prior to that the attempt in the 1960's failed because the patient's body reject the hand.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: Other HH mail is the residual household First-Class Mail with the following major financial statements, announcements/meetings, notices of order, request for and confirmation of donations, tax forms, education acceptances, and insurance policies.

Sentence 2: Tax forms are an example of First-Class Mail.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: These parents pressure school systems to be more rigorous and give more homework.

Sentence 2: These parents are concerned that schoolwork is not rigorous enough.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell