Sentence 1: In practical terms, maintenance usually lasts only five to seven years, and rarely longer than the marriage did.

Sentence 2: Marriage rarely lasts longer than the marriage and men are very happy about this.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: But modern Kagoshima is now an attractive green and airy place, with wide boulevards, delightful parks, and a couple of intriguing historical museums.

Sentence 2: There are a couple of historical museums in Kagoshima.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: How else could I perform the valuable service of being everyone's only GOP pal?

Sentence 2: How do I stop being everyone's only GOP pal?
Is this second sentence entailed by the first?

Answer:
no