Premise: There are pleasant walks along the coastline and stops for refreshment at the Cramond Inn, which is believed to be a setting described in Robert Louis Stevenson's St. Ives.

Hypothesis: Robert Louis Stevenson wrote a book which is believed to reference the Cramond Inn.

Does the premise entail the hypothesis?

Options are:
A). yes;
B). it is not possible to tell;
C). no;
A).