Yes / no, is the following a verifiable fact?
"The Mars Exploration Rover last communicated with Earth on June 10, 2018, as a planet-wide dust storm blanketed the solar-powered rover's location on Mars." 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
There were no more communications after the dust storm from Mars Exploration Rover.
Therefore, the answer is yes.