Give the rationale and then the answer. Yes / no, is the following a verifiable fact?
"John Philip Sousa wrote over 130 marches, earning him the nickname The March King."

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
John Philip Sousa was a famous composer who was well known for writing marches. The final answer: yes.