Sentence 1: More'n once too.

Sentence 2: At least twice.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: Plimpton got lost in his list at one point, but despite referring to one of the contributors to the display's soundtrack as Cecille Dion, he brought to the event his patrician sonorities and his fabled familiarity with fireworks.

Sentence 2: Plimpton is unfamiliar with fireworks.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: A Crusader castle brings swashbuckling to life, so try a trip to the walls of Mytilini or Kos Castle to become a knight of yore.

Sentence 2: If you want to become a knight of yore, you should take a trip to the walls of Mytilini or Kos Castle where a Crusader castle brings swashbuckling to life.
Is this second sentence entailed by the first?

Answer:
yes