Question: Sentence A: Its 16th- and 17th-century charm is preserved within a triangular rampart.

Sentence B: The charm was most likely made in 1699 and has been preserved.

If sentence A is true, how about sentence B?

Answer: it is not possible to tell

Question: Sentence A: the international operations in Bosnia and Kosovo face severe obstacles to achieving

Sentence B: There are are difficulties with international operations in Bosnia.

If sentence A is true, how about sentence B?

Answer: yes

Question: Sentence A: After that, the talented Miss Cowley drove successively a trade delivery van, a motor-lorry and a general!" The last was the pleasantest.

Sentence B: Miss Cowley never learned to drive a vehicle.

If sentence A is true, how about sentence B?

Answer: no

Question: Sentence A: Modern dance is enjoying a revival, with a new wave of small, imaginative companies beginning modestly enough at the Cafe de la Danse (passage Louis-Philippe) and Theatre Garnier before reaching the heights of the Theatre de la Bastille.

Sentence B: Modern dance is unpopular in France, you can only find it being performed on street corners.

If sentence A is true, how about sentence B?

Answer:
no