Yes / no, is the following a verifiable fact?
"The trail to Oregon City, Oregon known as the Oregon trail was dangerous." The thought process:

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 Oregon trail was named after Oregon City, Oregon because that was the destination.
Therefore, the answer is yes.