My question: Yes / no, is the following a verifiable fact?
"Waiting for Godot features themes related to existential crisis."
Please think gradually:

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
Waiting for Godot is a play written to express existential ideals.
Thus, the answer is yes.