For this chain-of-thought reasoning and answer, what was the question?
Bull sharks have been spotted un oceans as well as rivers and lakes.
 A: yes

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.
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Q: Is the following sentence factually correct?
"A Bull sharks swim in both salt water and fresh water."
Options:
- yes
- no