Is the following sentence factually correct?
"John the Baptist led the First Crusade."
Options:
- yes
- no

Let me think out loud. The First Crusade happened in the 11th century, long after John the Baptist had died. The answer is no.

Is the following sentence factually correct?
"The Sea of Azov lies in Crimea."
Options:
- yes
- no

Let me think out loud. The Sea of Azov borders Russia and Ukraine. The answer is yes.

Is the following a factual statement?
"Mathematicians are able to perform algebra."
Options:
- yes
- no
Let me think out loud. Algebra is an important basic skill for mathematicians. The answer is yes.