Q: Is the following sentence factually correct?
"Back to the Future starred Michael J. Fox as a high school student who travels through time."
Options:
- yes
- no
Chain-of-thought:

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
Michael J. Fox portrayed Marty McFly in the film Back to the Future and his character goes back in time to a period before he had been born in his own timeline. The answer: yes.