The band split on 1980, though they have some reunions later on.
This justifies what answer for what question? Q & A:

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
Is the following sentence factually correct?
"Led Zeppelin ended in the year 2000."
Options:
- yes
- no
no