QUESTION: Given the sentence "A man riding a blue motorcycle jumps over a ramp." is it true that "A man is driving down a flat street in his jeep."?

Let's solve it slowly: The man cannot drive a motorcycle and a Jeep at the same time.
The answer is no.

QUESTION: Given the sentence "A black woman and two black children are sitting in a thatched tent." is it true that "Some people are sitting in a tent."?

Let's solve it slowly: A woman and two children are some people. They are sitting in a tent.
The answer is yes.

QUESTION: Given the sentence "A man skates down a long outdoor stairway." is it true that "This man performs some extreme skating."?

Let's solve it slowly:
A man who skates down a long outdoor stairway is performing extreme skating.
The answer is yes.