Question:
A boy is grinding a skateboard down a concrete wall.

What is a sentence that would be (on a scale from 0 to 5) a 1 out of 5 in terms of textual similarity to the above sentence?

Answer:
A snowboarder rides a snowboard down a railing beside a flight of steps.

Question:
A passenger train waiting in a station.

What is a sentence that would be (on a scale from 0 to 5) a 2 out of 5 in terms of textual similarity to the above sentence?

Answer:
A passenger train in the snow.

Question:
A man and woman walking hold each other.

What is a sentence that would be (on a scale from 0 to 5) a 3 out of 5 in terms of textual similarity to the above sentence?

Answer:
A man and woman are walking.