Question:
Their only son, prince Don Juan, died here at the age of 19, and his tomb lies in the monastery.

Does it follow that "Don Juan was the only son, but he did have a sister."?
Answer:
it is not possible to tell

Question:
When Law's clients arrived after months at sea, the truth of the Mississippi Bubble was plain.

Does it follow that "Law's clients were furious to learn the truth of the Mississippi Bubble."?
Answer:
it is not possible to tell

Question:
Kyoto offers few more memorable experiences than secluded contemplation of Ryoanji's enigmatic rock garden.

Does it follow that "There is one experience in Kyoto that is more memorable than anything one can do in Ryoanji."?
Answer:
it is not possible to tell

Question:
She knew that her mother-in-law invariably kept all important papers in this particular case.

Does it follow that "Some important papers were kept by her mother-in-law."?
Answer:
yes