Sentence 1: yeah and they just can't grasp it

Sentence 2: They have a very strong grip on the subject.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: yeah it's a nice way to relax i mean in a way i mean i find it anyway although sometimes watching the news isn't very relaxing i get home from from

Sentence 2: Watching the news isn't always relaxing.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: The most important are clustered around three adjoining the triangular Piazza della Ceterna named after the city's 13th-century travertine well, surrounded by elegant palaces; the Piazza del Duomo, grouping church and town hall as the center of civic and religious power; and the Piazza delle Erbe ?market place with twin Salvucci towers.

Sentence 2: The Salvucci towers are open to visitors.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell