Premise: "A guard stands watch at a monument as tourists look on."
Hypothesis: "A guard is watching the washington monument."
Do we know that the hypothesis entailed by the premise? Now, let's be accurate as possible. Some thinking first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The guard standing watch at a monument need not be Washington Monument. So, the answer is it is not possible to tell.