Is the following sentence factually correct?
"Mark the Evangelist wrote the gospel of Mark and begun the church of Alexandria."
Options:
- yes
- no

Let me think out loud. This is true because it can be traced back from the bible and history books of the Jews. The answer is yes.

Claim: "Physical education classes promote exercise for school students."
Is the claim above correct, and can it be verified by human common sense and without a web search?
Options:
- yes
- no

Let me think out loud. Physical Education is a school subject focused on exercise. The answer is yes.

Is the following statement true?
"The world ocean is the largest Ecosystem on planet."
Let me think out loud. The world ocean is covering 71% of the earth surface. The answer is yes.