Question: Is the following sentence factually correct?
"The Golden Rule determines the exchange rate for gold on international markets."
Options:
- yes
- no

Let me think..... The golden rule us unrelated to Au 79, an element on the Periodic Table. The answer is no.

Question: "Cheeseburgers contain meat topped with cheese."
Is the above claim true?
Options:
- yes
- no

Let me think..... Cheeseburgers are a sandwich where meat and cheese are together. The answer is yes.

Question: Does the following sentence make sense?
"Lexington, Kentucky acts as the capitol of the state of Kentucky in the USA."
Options:
- yes
- no

Let me think..... Lexington, Kentucky is recognized as the capitol of the state of Kentucky. The answer is yes.

Question: Claim: "Cyanobacteria play a key role in environmental chemistry and bacteria fields."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no

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
Let me think..... Cyanobacteria are responsible for many different forms of synthesis, including photosynthesis. The answer is yes.