Q: Is there historic graffiti on Alcatraz?
A: yes
CoT: Native Americans occupied the island of Alcatraz in 1969. Wall writings from the Native American occupation has been preserved and in some cases, restored completely.

Q: Can a carrot receive an organ transplant?
A: no
CoT: Organs are groups of tissues that perform a similar function. The whole of a carrot is a root. A root is a plant organ. You cannot transplant the entire carrot into another carrot.

Q: Did Marco Polo travel with Christopher Columbus?
A: no
CoT:
Marco Polo died in 1324. Christopher Columbus was born in 1451.